Q: What is the sum of all factors of the number 391,990 excluding 391,990?

 A: 313,610

Why is 313,610 the sum of all factors of 391,990, excluding 391,990?

The factors of the number 391,990 are: 1, 2, 5, 10, 39199, 78398, 195995, 391990.

If you add them up, you will get the total of 392,303. Now subtract 391,990 to get 313,610


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