Q: What is the sum of all factors of the number 428,399 excluding 428,399?

 A: 18,721

Why is 18,721 the sum of all factors of 428,399, excluding 428,399?

The factors of the number 428,399 are: 1, 53, 59, 137, 3127, 7261, 8083, 428399.

If you add them up, you will get the total of 428,417. Now subtract 428,399 to get 18,721


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