Q: What is the sum of all factors of the number 400,280 excluding 400,280?

A: 500,440

Why is 500,440 the sum of all factors of 400,280, excluding 400,280?

The factors of the number 400,280 are: 1, 2, 4, 5, 8, 10, 20, 40, 10007, 20014, 40028, 50035, 80056, 100070, 200140, 400280.

If you add them up, you will get the total of 400,780. Now subtract 400,280 to get 500,440

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