100

100 is an even composite number composed of two prime numbers multiplied together.

100 is an even composite number. It is composed of two distinct prime numbers multiplied together. It has a total of nine divisors.

Prime factorization of 100:

22 × 52

(2 × 2 × 5 × 5)

See below for interesting mathematical facts about the number 100 from the Numbermatics database.

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Names Factors Divisors Scales Roots Fun

Names of 100

  • Cardinal: 100 can be written as One hundred.

Scientific notation

  • Scientific notation: 1 × 102

Factors of 100

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 4
  • Sum of prime factors: 7

Divisors of 100

  • Number of divisors d(n): 9
  • Complete list of divisors:
    1 2 4 5 10 20 25 50 100
  • Sum of all divisors σ(n): 217
  • Sum of proper divisors (its aliquot sum) s(n): 117
  • 100 is an abundant number, because the sum of its proper divisors (117) is greater than itself. Its abundance is 17

Bases of 100

  • Binary: 1100100 2
  • Hexadecimal: 0x64

Squares and roots of 100

  • 100 squared (1002) is 10000
  • 100 cubed (1003) is 1000000
  • 100 is a perfect square number. Its square root is 10
  • The cube root of 100 is 4.6415888337

Scales and comparisons

How big is 100?
  • 100 seconds is equal to 1 minute, 40 seconds.
  • To count from 1 to 100 would take you about fifty seconds.

    This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000.

    Note: we do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!

  • A cube with a volume of 100 cubic inches would be around 0.4 feet tall.

Recreational maths with 100

  • 100 backwards is 001
  • 100 is a Harshad number.
  • The number of decimal digits it has is: 3
  • The sum of 100's digits is 1
  • More coming soon!

The information we have on file for 100 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

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