Is 90 an abundant number and what is its abundance?

Is 90 an abundant number?

Here we will explain and calculate if 90 is an abundant number and its abundance if applicable.

90 is an abundant number if the sum of its proper divisors is greater than 90.

The sum of its proper divisors is calculated as follows: 1 + 2 + 3 + 5 + 6 + 9 + 10 + 15 + 18 + 30 + 45 = 144.

144 is greater than 90. Therefore, 90 is an abundant number.

The abundance of 90 is the sum of its proper divisors minus 90. Thus, the abundance of 90 is 144 - 90 = 54

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