Is 20 a deficient number and what is its deficiency?

Is 20 a deficient number?

Here we will explain and calculate if 20 is a deficient number and its deficiency if applicable.

20 is a deficient number if the sum of its proper divisors is less than 20.

The sum of its proper divisors is calculated as follows: 1 + 2 + 4 + 5 + 10 = 22.

22 is not less than 20. Therefore, 20 is not a deficient number.

The deficiency of 20 is 20 minus the sum of its proper divisors. Thus, the deficiency of 20 is 20 - 22 = No Deficiency

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