Q: What is the sum of all factors of the number 99,981 excluding 99,981?

 A: 76,979

Why is 76,979 the sum of all factors of 99,981, excluding 99,981?

The factors of the number 99,981 are: 1, 3, 7, 9, 21, 23, 27, 63, 69, 161, 189, 207, 483, 529, 621, 1449, 1587, 3703, 4347, 4761, 11109, 14283, 33327, 99981.

If you add them up, you will get the total of 100,057. Now subtract 99,981 to get 76,979


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