Is 520 a deficient number and what is its deficiency?

Is 520 a deficient number?

Here we will explain and calculate if 520 is a deficient number and its deficiency if applicable.

520 is a deficient number if the sum of its proper divisors is less than 520.

The sum of its proper divisors is calculated as follows: 1 + 2 + 4 + 5 + 8 + 10 + 13 + 20 + 26 + 40 + 52 + 65 + 104 + 130 + 260 = 740.

740 is not less than 520. Therefore, 520 is not a deficient number.

The deficiency of 520 is 520 minus the sum of its proper divisors. Thus, the deficiency of 520 is 520 - 740 = No Deficiency

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