Q: What is the sum of all factors of the number 640,839 excluding 640,839?

 A: 213,617

Why is 213,617 the sum of all factors of 640,839, excluding 640,839?

The factors of the number 640,839 are: 1, 3, 213613, 640839.

If you add them up, you will get the total of 641,052. Now subtract 640,839 to get 213,617


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