Is 45 a deficient number and what is its deficiency?

Is 45 a deficient number?

Here we will explain and calculate if 45 is a deficient number and its deficiency if applicable.

45 is a deficient number if the sum of its proper divisors is less than 45.

The sum of its proper divisors is calculated as follows: 1 + 3 + 5 + 9 + 15 = 33.

33 is less than 45. Therefore, 45 is a deficient number.

The deficiency of 45 is 45 minus the sum of its proper divisors. Thus, the deficiency of 45 is 45 - 33 = 12

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