Q: What is the sum of all factors of the number 86,391 excluding 86,391?

 A: 43,089

Why is 43,089 the sum of all factors of 86,391, excluding 86,391?

The factors of the number 86,391 are: 1, 3, 9, 29, 87, 261, 331, 993, 2979, 9599, 28797, 86391.

If you add them up, you will get the total of 86,434. Now subtract 86,391 to get 43,089


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