Q: What is the sum of all factors of the number 20,209,561 excluding 20,209,561?

 A: 1

Why is 1 the sum of all factors of 20,209,561, excluding 20,209,561?

The factors of the number 20,209,561 are: 1, 20209561.

If you add them up, you will get the total of 20,209,562. Now subtract 20,209,561 to get 1


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