Is 18 an abundant number and what is its abundance?

Is 18 an abundant number?

Here we will explain and calculate if 18 is an abundant number and its abundance if applicable.

18 is an abundant number if the sum of its proper divisors is greater than 18.

The sum of its proper divisors is calculated as follows: 1 + 2 + 3 + 6 + 9 = 21.

21 is greater than 18. Therefore, 18 is an abundant number.

The abundance of 18 is the sum of its proper divisors minus 18. Thus, the abundance of 18 is 21 - 18 = 3

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