Q: What is the sum of all factors of the number 138,978 excluding 138,978?

 A: 205,470

Why is 205,470 the sum of all factors of 138,978, excluding 138,978?

The factors of the number 138,978 are: 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, 1103, 2206, 3309, 6618, 7721, 9927, 15442, 19854, 23163, 46326, 69489, 138978.

If you add them up, you will get the total of 139,183. Now subtract 138,978 to get 205,470


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