Q: What is the sum of all factors of the number 1,340 excluding 1,340?

 A: 1,516

Why is 1,516 the sum of all factors of 1,340, excluding 1,340?

The factors of the number 1,340 are: 1, 2, 4, 5, 10, 20, 67, 134, 268, 335, 670, 1340.

If you add them up, you will get the total of 1,341. Now subtract 1,340 to get 1,516


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