104 105 → Factorization 2× 13 | Cardinal one hundred four Roman numeral CIV | |

Ordinal 104th
(one hundred and fourth) Divisors 1, 2, 4, 8, 13, 26, 52, 104 |

**104** (**one hundred [and] four**) is the natural number following 103 and preceding 105.

## Contents

## In mathematics

104 is a primitive semiperfect number and a composite number, with its divisors 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. 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, 104 is the smallest number of unit line segments that can exist in a plane with four of them touching at every vertex.

## In science

## In other fields

**104** is also:

## References

104 (number) Wikipedia(Text) CC BY-SA