Is 280 a deficient number and what is its deficiency?

Is 280 a deficient number?

Here we will explain and calculate if 280 is a deficient number and its deficiency if applicable.

280 is a deficient number if the sum of its proper divisors is less than 280.

The sum of its proper divisors is calculated as follows: 1 + 2 + 4 + 5 + 7 + 8 + 10 + 14 + 20 + 28 + 35 + 40 + 56 + 70 + 140 = 440.

440 is not less than 280. Therefore, 280 is not a deficient number.

The deficiency of 280 is 280 minus the sum of its proper divisors. Thus, the deficiency of 280 is 280 - 440 = No Deficiency

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