Is 1890 a deficient number and what is its deficiency?

Is 1890 a deficient number?

Here we will explain and calculate if 1890 is a deficient number and its deficiency if applicable.

1890 is a deficient number if the sum of its proper divisors is less than 1890.

The sum of its proper divisors is calculated as follows: 1 + 2 + 3 + 5 + 6 + 7 + 9 + 10 + 14 + 15 + 18 + 21 + 27 + 30 + 35 + 42 + 45 + 54 + 63 + 70 + 90 + 105 + 126 + 135 + 189 + 210 + 270 + 315 + 378 + 630 + 945 = 3870.

3870 is not less than 1890. Therefore, 1890 is not a deficient number.

The deficiency of 1890 is 1890 minus the sum of its proper divisors. Thus, the deficiency of 1890 is 1890 - 3870 = No Deficiency

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