Chükö

abundant numbers

An abundant number is a number that is smaller than the sum of its proper divisors.

The first few abundant numbers are: 12, 18, 20, 24, 30, 36, 40, 42, 48, 54, 56, 60, …

247,544 of the first one million positive integers are abundant.

Learn more about abundant numbers on wikipedia.

See other features.