Q: What is the sum of all factors of the number 128,309 excluding 128,309?

 A: 4,171

Why is 4,171 the sum of all factors of 128,309, excluding 128,309?

The factors of the number 128,309 are: 1, 31, 4139, 128309.

If you add them up, you will get the total of 128,313. Now subtract 128,309 to get 4,171


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