Q: What is the sum of all factors of the number 638,406,869 excluding 638,406,869?

 A: 1

Why is 1 the sum of all factors of 638,406,869, excluding 638,406,869?

The factors of the number 638,406,869 are: 1, 638406869.

If you add them up, you will get the total of 638,406,870. Now subtract 638,406,869 to get 1


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