Q: What is the sum of all factors of the number 639,428 excluding 639,428?

 A: 479,578

Why is 479,578 the sum of all factors of 639,428, excluding 639,428?

The factors of the number 639,428 are: 1, 2, 4, 159857, 319714, 639428.

If you add them up, you will get the total of 639,907. Now subtract 639,428 to get 479,578


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