Is 165 a deficient number and what is its deficiency?

Is 165 a deficient number?

Here we will explain and calculate if 165 is a deficient number and its deficiency if applicable.

165 is a deficient number if the sum of its proper divisors is less than 165.

The sum of its proper divisors is calculated as follows: 1 + 3 + 5 + 11 + 15 + 33 + 55 = 123.

123 is less than 165. Therefore, 165 is a deficient number.

The deficiency of 165 is 165 minus the sum of its proper divisors. Thus, the deficiency of 165 is 165 - 123 = 42

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