Q: What is the sum of all factors of the number 640,487 excluding 640,487?

 A: 1,609

Why is 1,609 the sum of all factors of 640,487, excluding 640,487?

The factors of the number 640,487 are: 1, 727, 881, 640487.

If you add them up, you will get the total of 640,488. Now subtract 640,487 to get 1,609


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