Q: What is the sum of all factors of the number 642,203,399 excluding 642,203,399?

 A: 1

Why is 1 the sum of all factors of 642,203,399, excluding 642,203,399?

The factors of the number 642,203,399 are: 1, 642203399.

If you add them up, you will get the total of 642,203,400. Now subtract 642,203,399 to get 1


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