Q: What is the sum of all factors of the number 20,720,221 excluding 20,720,221?

 A: 1

Why is 1 the sum of all factors of 20,720,221, excluding 20,720,221?

The factors of the number 20,720,221 are: 1, 20720221.

If you add them up, you will get the total of 20,720,222. Now subtract 20,720,221 to get 1


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