Q: What is the sum of all factors of the number 28,390 excluding 28,390?

 A: 26,042

Why is 26,042 the sum of all factors of 28,390, excluding 28,390?

The factors of the number 28,390 are: 1, 2, 5, 10, 17, 34, 85, 167, 170, 334, 835, 1670, 2839, 5678, 14195, 28390.

If you add them up, you will get the total of 28,416. Now subtract 28,390 to get 26,042


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