Q: What is the sum of all factors of the number 640,007 excluding 640,007?

 A: 1

Why is 1 the sum of all factors of 640,007, excluding 640,007?

The factors of the number 640,007 are: 1, 640007.

If you add them up, you will get the total of 640,008. Now subtract 640,007 to get 1


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