Q: What is the sum of all factors of the number 280,989 excluding 280,989?

 A: 138,881

Why is 138,881 the sum of all factors of 280,989, excluding 280,989?

The factors of the number 280,989 are: 1, 3, 9, 27, 81, 3469, 10407, 31221, 93663, 280989.

If you add them up, you will get the total of 281,127. Now subtract 280,989 to get 138,881


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