Q: What is the sum of all factors of the number 280,391 excluding 280,391?

 A: 1,609

Why is 1,609 the sum of all factors of 280,391, excluding 280,391?

The factors of the number 280,391 are: 1, 199, 1409, 280391.

If you add them up, you will get the total of 280,392. Now subtract 280,391 to get 1,609


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