Q: What is the sum of all factors of the number 378,990 excluding 378,990?

 A: 606,618

Why is 606,618 the sum of all factors of 378,990, excluding 378,990?

The factors of the number 378,990 are: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 4211, 8422, 12633, 21055, 25266, 37899, 42110, 63165, 75798, 126330, 189495, 378990.

If you add them up, you will get the total of 379,596. Now subtract 378,990 to get 606,618


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