Is 1720 a deficient number and what is its deficiency?

Is 1720 a deficient number?

Here we will explain and calculate if 1720 is a deficient number and its deficiency if applicable.

1720 is a deficient number if the sum of its proper divisors is less than 1720.

The sum of its proper divisors is calculated as follows: 1 + 2 + 4 + 5 + 8 + 10 + 20 + 40 + 43 + 86 + 172 + 215 + 344 + 430 + 860 = 2240.

2240 is not less than 1720. Therefore, 1720 is not a deficient number.

The deficiency of 1720 is 1720 minus the sum of its proper divisors. Thus, the deficiency of 1720 is 1720 - 2240 = No Deficiency

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