104 (number)
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104 is a natural number that comes after 103 and before 105. It is an even number and a composite number, meaning it has divisors other than 1 and itself.
In Roman numerals it is written as CIV. In binary notation it is written as 1101000, while in hexadecimal it is 68.
Mathematical properties
The prime factorization of 104 is 2³ × 13, which equals 8 × 13. Its divisors are 1, 2, 4, 8, 13, 26, 52, and 104—eight divisors in total.
The sum of the divisors of 104 is 210. When 104 is subtracted from this sum, 106 remains, which is greater than the number itself. For this reason, 104 is classified as an abundant number, one whose divisors sum to more than the number itself.
The number of divisors of 104 is 8, and 104 is divisible by 8 (104 ÷ 8 = 13). Numbers with this property are known as refactorable or tau numbers.
General use
104 represents approximately two weeks multiplied by 52 weeks per year (52 × 2), and is commonly used in calculations involving the number of weekend days in a year (Saturday and Sunday, two days in each of the 52 weeks). It also appears in various proper names for vehicles, roads, and equipment, used differently across different countries.