Q: What is the sum of all factors of the number 638,406,871 excluding 638,406,871?

 A: 1

Why is 1 the sum of all factors of 638,406,871, excluding 638,406,871?

The factors of the number 638,406,871 are: 1, 638406871.

If you add them up, you will get the total of 638,406,872. Now subtract 638,406,871 to get 1


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