Q: What is the sum of all factors of the number 398,221 excluding 398,221?

 A: 20,979

Why is 20,979 the sum of all factors of 398,221, excluding 398,221?

The factors of the number 398,221 are: 1, 19, 20959, 398221.

If you add them up, you will get the total of 398,241. Now subtract 398,221 to get 20,979


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