100

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: 1100100₂
• Hexadecimal: 0x64
• Base-36: 2S

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

• 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. (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!