Q: What is the sum of all factors of the number 640,435 excluding 640,435?

 A: 161,645

Why is 161,645 the sum of all factors of 640,435, excluding 640,435?

The factors of the number 640,435 are: 1, 5, 23, 115, 5569, 27845, 128087, 640435.

If you add them up, you will get the total of 640,596. Now subtract 640,435 to get 161,645


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