Abundant number

An abundant number is a number for which the sum of its proper divisors is greater than itself. For example, 12 is abundant because the sum of its proper divisors is 1 + 2 + 3 + 4 + 6 = 16 > 12.

Examples

The first 10 abundant numbers are: 12, 18, 20, 24, 30, 36, 40, 42, 48, and 54 The first 10 odd abundant numbers are: 945, 1575, 2205, 2835, 3465, 4095, 4725, 5355, 5775, and 5985

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