Q: What is the sum of all factors of the number 391,780 excluding 391,780?

 A: 475,100

Why is 475,100 the sum of all factors of 391,780, excluding 391,780?

The factors of the number 391,780 are: 1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 1031, 2062, 4124, 5155, 10310, 19589, 20620, 39178, 78356, 97945, 195890, 391780.

If you add them up, you will get the total of 392,255. Now subtract 391,780 to get 475,100


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