Q: What is the sum of all factors of the number 257,387 excluding 257,387?

 A: 21,505

Why is 21,505 the sum of all factors of 257,387, excluding 257,387?

The factors of the number 257,387 are: 1, 13, 169, 1523, 19799, 257387.

If you add them up, you will get the total of 257,408. Now subtract 257,387 to get 21,505


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