Q: What is the sum of all factors of the number 640,013 excluding 640,013?

 A: 67,603

Why is 67,603 the sum of all factors of 640,013, excluding 640,013?

The factors of the number 640,013 are: 1, 11, 83, 701, 913, 7711, 58183, 640013.

If you add them up, you will get the total of 640,080. Now subtract 640,013 to get 67,603


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