Is 1620 a deficient number and what is its deficiency?

Is 1620 a deficient number?

Here we will explain and calculate if 1620 is a deficient number and its deficiency if applicable.

1620 is a deficient number if the sum of its proper divisors is less than 1620.

The sum of its proper divisors is calculated as follows: 1 + 2 + 3 + 4 + 5 + 6 + 9 + 10 + 12 + 15 + 18 + 20 + 27 + 30 + 36 + 45 + 54 + 60 + 81 + 90 + 108 + 135 + 162 + 180 + 270 + 324 + 405 + 540 + 810 = 3462.

3462 is not less than 1620. Therefore, 1620 is not a deficient number.

The deficiency of 1620 is 1620 minus the sum of its proper divisors. Thus, the deficiency of 1620 is 1620 - 3462 = No Deficiency

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