Q: What is the sum of all factors of the number 640,443 excluding 640,443?

 A: 213,485

Why is 213,485 the sum of all factors of 640,443, excluding 640,443?

The factors of the number 640,443 are: 1, 3, 213481, 640443.

If you add them up, you will get the total of 640,656. Now subtract 640,443 to get 213,485


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