104 (one hundred
ndfour) is the
natural number
In mathematics, the natural numbers are those numbers used for counting (as in "there are ''six'' coins on the table") and ordering (as in "this is the ''third'' largest city in the country").
Numbers used for counting are called ''Cardinal n ...
following
103 and preceding
105.
In mathematics
104 is a
primitive semiperfect number and a
composite number
A composite number is a positive integer that can be formed by multiplying two smaller positive integers. Equivalently, it is a positive integer that has at least one divisor other than 1 and itself. Every positive integer is composite, prime, ...
, with its
divisor
In mathematics, a divisor of an integer n, also called a factor of n, is an integer m that may be multiplied by some integer to produce n. In this case, one also says that n is a multiple of m. An integer n is divisible or evenly divisible by ...
s being 1, 2, 4, 8, 13, 26, 52 and 104. As it has 8 divisors total, and 8 is one of those divisors, 104 is a
refactorable number
A refactorable number or tau number is an integer ''n'' that is divisible by the count of its divisors, or to put it algebraically, ''n'' is such that \tau(n)\mid n. The first few refactorable numbers are listed in as
: 1, 2, 8, 9, 12, 18, ...
. The distinct prime factors of 104 add up to 15, and so do the ones of 105, hence the two numbers form a
Ruth-Aaron pair under the first definition.
In regular
geometry
Geometry (; ) is, with arithmetic, one of the oldest branches of mathematics. It is concerned with properties of space such as the distance, shape, size, and relative position of figures. A mathematician who works in the field of geometry is c ...
, 104 is the smallest number of unit line segments that can exist in a plane with four of them touching at every
vertex
Vertex, vertices or vertexes may refer to:
Science and technology Mathematics and computer science
*Vertex (geometry), a point where two or more curves, lines, or edges meet
* Vertex (computer graphics), a data structure that describes the positio ...
.
A figure made up of a row of 4 adjacent congruent rectangles is divided into 104 regions upon drawing diagonals of all possible rectangles
φ(104) = φ(σ(104)).
In science
*The
atomic number
The atomic number or nuclear charge number (symbol ''Z'') of a chemical element is the charge number of an atomic nucleus. For ordinary nuclei, this is equal to the proton number (''n''p) or the number of protons found in the nucleus of every ...
of
rutherfordium
Rutherfordium is a chemical element with the symbol Rf and atomic number 104, named after New Zealand-born British physicist Ernest Rutherford. As a synthetic element, it is not found in nature and can only be made in a laboratory. It is radioactiv ...
.
*Number of degrees Fahrenheit corresponding to 40 Celsius.
In other fields
104 is also:
*The number of Corinthian columns in the
Temple of Olympian Zeus, the largest temple ever built in
Greece
Greece,, or , romanized: ', officially the Hellenic Republic, is a country in Southeast Europe. It is situated on the southern tip of the Balkans, and is located at the crossroads of Europe, Asia, and Africa. Greece shares land borders with ...
.
*The number of guns on Admiral
Horatio Nelson
Vice-Admiral Horatio Nelson, 1st Viscount Nelson, 1st Duke of Bronte (29 September 1758 – 21 October 1805) was a British flag officer in the Royal Navy. His inspirational leadership, grasp of strategy, and unconventional tactics brought abo ...
's flagship
HMS ''Victory''.
*The number of keys on a
standard Windows keyboard.
*The number of Symphonies written by
Joseph Haydn
Franz Joseph Haydn ( , ; 31 March 173231 May 1809) was an Austrian composer of the Classical period (music), Classical period. He was instrumental in the development of chamber music such as the string quartet and piano trio. His contributions ...
upon which numbers are agreed (though in fact, he wrote more: see
list of symphonies by Joseph Haydn
There are 106 symphonies by the classical composer Joseph Haydn (1732–1809). Of these, 104 have numbers associated with them which were originally assigned by Eusebius Mandyczewski in 1908 in the chronological order that was known at the time. ...
).
*
Cent Quatre
The Cent Quatre (, meaning "104") is a public cultural centre in Paris, which opened on 11 October 2008 on the site of a former municipal undertaker's at 104 rue d'Aubervilliers, in the 19th arrondissement of the city.
History of the building
In ...
, an arts centre in Paris.
See also
*
List of highways numbered 104
Route 104, or Highway 104, may refer to:
Brazil
* BR-104
Canada
* New Brunswick Route 104
* Nova Scotia Highway 104 (Trans-Canada Highway)
* Prince Edward Island Route 104
* Quebec Route 104
China
* China National Highway 104
Costa Rica
* Na ...
*
UFC 104
''UFC 104: Machida vs. Shogun'' was a mixed martial arts event held by the Ultimate Fighting Championship (UFC) on October 24, 2009 in Los Angeles, California.
Background
As with UFC 103, the UFC announced a portion of the preliminary card would ...
References
* Wells, D. ''
The Penguin Dictionary of Curious and Interesting Numbers
''The Penguin Dictionary of Curious and Interesting Numbers'' is a reference book for recreational mathematics and elementary number theory written by David Wells. The first edition was published in paperback by Penguin Books in 1986 in the UK, ...
'' London: Penguin Group. (1987): 133
{{DEFAULTSORT:104 (Number)
Integers