Is 255 a deficient number and what is its deficiency?

Is 255 a deficient number?

Here we will explain and calculate if 255 is a deficient number and its deficiency if applicable.

255 is a deficient number if the sum of its proper divisors is less than 255.

The sum of its proper divisors is calculated as follows: 1 + 3 + 5 + 15 + 17 + 51 + 85 = 177.

177 is less than 255. Therefore, 255 is a deficient number.

The deficiency of 255 is 255 minus the sum of its proper divisors. Thus, the deficiency of 255 is 255 - 177 = 78

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