Q: What is the sum of all factors of the number 21,430 excluding 21,430?

 A: 17,162

Why is 17,162 the sum of all factors of 21,430, excluding 21,430?

The factors of the number 21,430 are: 1, 2, 5, 10, 2143, 4286, 10715, 21430.

If you add them up, you will get the total of 21,447. Now subtract 21,430 to get 17,162


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