Q: What is the sum of all factors of the number 664,520,503 excluding 664,520,503?

 A: 640,617

Why is 640,617 the sum of all factors of 664,520,503, excluding 664,520,503?

The factors of the number 664,520,503 are: 1, 1039, 639577, 664520503.

If you add them up, you will get the total of 664,521,143. Now subtract 664,520,503 to get 640,617


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