Is 261 a deficient number and what is its deficiency?

Is 261 a deficient number?

Here we will explain and calculate if 261 is a deficient number and its deficiency if applicable.

261 is a deficient number if the sum of its proper divisors is less than 261.

The sum of its proper divisors is calculated as follows: 1 + 3 + 9 + 29 + 87 = 129.

129 is less than 261. Therefore, 261 is a deficient number.

The deficiency of 261 is 261 minus the sum of its proper divisors. Thus, the deficiency of 261 is 261 - 129 = 132

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