Q: What is the sum of all factors of the number 128,860 excluding 128,860?

 A: 158,420

Why is 158,420 the sum of all factors of 128,860, excluding 128,860?

The factors of the number 128,860 are: 1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 379, 758, 1516, 1895, 3790, 6443, 7580, 12886, 25772, 32215, 64430, 128860.

If you add them up, you will get the total of 129,018. Now subtract 128,860 to get 158,420


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