Q: What is the sum of all factors of the number 639,605 excluding 639,605?

 A: 127,927

Why is 127,927 the sum of all factors of 639,605, excluding 639,605?

The factors of the number 639,605 are: 1, 5, 127921, 639605.

If you add them up, you will get the total of 639,732. Now subtract 639,605 to get 127,927


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