Q: What is the sum of all factors of the number 387 excluding 387?

 A: 185

Why is 185 the sum of all factors of 387, excluding 387?

The factors of the number 387 are: 1, 3, 9, 43, 129, 387.

If you add them up, you will get the total of 572. Now subtract 387 to get 185


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