Is 1820 a deficient number and what is its deficiency?

Is 1820 a deficient number?

Here we will explain and calculate if 1820 is a deficient number and its deficiency if applicable.

1820 is a deficient number if the sum of its proper divisors is less than 1820.

The sum of its proper divisors is calculated as follows: 1 + 2 + 4 + 5 + 7 + 10 + 13 + 14 + 20 + 26 + 28 + 35 + 52 + 65 + 70 + 91 + 130 + 140 + 182 + 260 + 364 + 455 + 910 = 2884.

2884 is not less than 1820. Therefore, 1820 is not a deficient number.

The deficiency of 1820 is 1820 minus the sum of its proper divisors. Thus, the deficiency of 1820 is 1820 - 2884 = No Deficiency

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