Q: What is the sum of all factors of the number 639,995 excluding 639,995?

 A: 152,965

Why is 152,965 the sum of all factors of 639,995, excluding 639,995?

The factors of the number 639,995 are: 1, 5, 31, 155, 4129, 20645, 127999, 639995.

If you add them up, you will get the total of 640,147. Now subtract 639,995 to get 152,965


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