Is 285 a deficient number and what is its deficiency?

Is 285 a deficient number?

Here we will explain and calculate if 285 is a deficient number and its deficiency if applicable.

285 is a deficient number if the sum of its proper divisors is less than 285.

The sum of its proper divisors is calculated as follows: 1 + 3 + 5 + 15 + 19 + 57 + 95 = 195.

195 is less than 285. Therefore, 285 is a deficient number.

The deficiency of 285 is 285 minus the sum of its proper divisors. Thus, the deficiency of 285 is 285 - 195 = 90

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