Is 2020 a deficient number and what is its deficiency?

Is 2020 a deficient number?

Here we will explain and calculate if 2020 is a deficient number and its deficiency if applicable.

2020 is a deficient number if the sum of its proper divisors is less than 2020.

The sum of its proper divisors is calculated as follows: 1 + 2 + 4 + 5 + 10 + 20 + 101 + 202 + 404 + 505 + 1010 = 2264.

2264 is not less than 2020. Therefore, 2020 is not a deficient number.

The deficiency of 2020 is 2020 minus the sum of its proper divisors. Thus, the deficiency of 2020 is 2020 - 2264 = No Deficiency

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