Is 2805 a deficient number and what is its deficiency?

Is 2805 a deficient number?

Here we will explain and calculate if 2805 is a deficient number and its deficiency if applicable.

2805 is a deficient number if the sum of its proper divisors is less than 2805.

The sum of its proper divisors is calculated as follows: 1 + 3 + 5 + 11 + 15 + 17 + 33 + 51 + 55 + 85 + 165 + 187 + 255 + 561 + 935 = 2379.

2379 is less than 2805. Therefore, 2805 is a deficient number.

The deficiency of 2805 is 2805 minus the sum of its proper divisors. Thus, the deficiency of 2805 is 2805 - 2379 = 426

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