Q: What is the sum of all factors of the number 109,989 excluding 109,989?

A: 66,369

Why is 66,369 the sum of all factors of 109,989, excluding 109,989?

The factors of the number 109,989 are: 1, 3, 9, 11, 33, 99, 101, 121, 303, 363, 909, 1089, 1111, 3333, 9999, 12221, 36663, 109989.

If you add them up, you will get the total of 110,055. Now subtract 109,989 to get 66,369

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