Q: What is the sum of all factors of the number 128,289 excluding 128,289?

A: 73,311

Why is 73,311 the sum of all factors of 128,289, excluding 128,289?

The factors of the number 128,289 are: 1, 3, 7, 21, 41, 123, 149, 287, 447, 861, 1043, 3129, 6109, 18327, 42763, 128289.

If you add them up, you will get the total of 128,362. Now subtract 128,289 to get 73,311

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