Is 357 a deficient number and what is its deficiency?

Is 357 a deficient number?

Here we will explain and calculate if 357 is a deficient number and its deficiency if applicable.

357 is a deficient number if the sum of its proper divisors is less than 357.

The sum of its proper divisors is calculated as follows: 1 + 3 + 7 + 17 + 21 + 51 + 119 = 219.

219 is less than 357. Therefore, 357 is a deficient number.

The deficiency of 357 is 357 minus the sum of its proper divisors. Thus, the deficiency of 357 is 357 - 219 = 138

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