Q: What is the sum of all factors of the number 557,778,821 excluding 557,778,821?

 A: 1

Why is 1 the sum of all factors of 557,778,821, excluding 557,778,821?

The factors of the number 557,778,821 are: 1, 557778821.

If you add them up, you will get the total of 557,778,822. Now subtract 557,778,821 to get 1


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