Q: What is the sum of all factors of the number 138,280 excluding 138,280?

 A: 172,940

Why is 172,940 the sum of all factors of 138,280, excluding 138,280?

The factors of the number 138,280 are: 1, 2, 4, 5, 8, 10, 20, 40, 3457, 6914, 13828, 17285, 27656, 34570, 69140, 138280.

If you add them up, you will get the total of 138,452. Now subtract 138,280 to get 172,940


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