Q: What is the sum of all factors of the number 21,511,151 excluding 21,511,151?

 A: 1

Why is 1 the sum of all factors of 21,511,151, excluding 21,511,151?

The factors of the number 21,511,151 are: 1, 21511151.

If you add them up, you will get the total of 21,511,152. Now subtract 21,511,151 to get 1


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