Q: What is the sum of all factors of the number 640,270 excluding 640,270?

 A: 539,810

Why is 539,810 the sum of all factors of 640,270, excluding 640,270?

The factors of the number 640,270 are: 1, 2, 5, 10, 43, 86, 215, 430, 1489, 2978, 7445, 14890, 64027, 128054, 320135, 640270.

If you add them up, you will get the total of 640,809. Now subtract 640,270 to get 539,810


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