Q: What is the sum of all factors of the number 643,642 excluding 643,642?

 A: 321,824

Why is 321,824 the sum of all factors of 643,642, excluding 643,642?

The factors of the number 643,642 are: 1, 2, 321821, 643642.

If you add them up, you will get the total of 643,963. Now subtract 643,642 to get 321,824


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