Q: What is the sum of all factors of the number 640,534,561 excluding 640,534,561?

 A: 1

Why is 1 the sum of all factors of 640,534,561, excluding 640,534,561?

The factors of the number 640,534,561 are: 1, 640534561.

If you add them up, you will get the total of 640,534,562. Now subtract 640,534,561 to get 1


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640,534,559640,534,560640,534,562640,534,563
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