Is 1305 a deficient number and what is its deficiency?

Is 1305 a deficient number?

Here we will explain and calculate if 1305 is a deficient number and its deficiency if applicable.

1305 is a deficient number if the sum of its proper divisors is less than 1305.

The sum of its proper divisors is calculated as follows: 1 + 3 + 5 + 9 + 15 + 29 + 45 + 87 + 145 + 261 + 435 = 1035.

1035 is less than 1305. Therefore, 1305 is a deficient number.

The deficiency of 1305 is 1305 minus the sum of its proper divisors. Thus, the deficiency of 1305 is 1305 - 1035 = 270

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