Q: What is the sum of all factors of the number 712,840 excluding 712,840?

 A: 920,120

Why is 920,120 the sum of all factors of 712,840, excluding 712,840?

The factors of the number 712,840 are: 1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 251, 284, 355, 502, 568, 710, 1004, 1255, 1420, 2008, 2510, 2840, 5020, 10040, 17821, 35642, 71284, 89105, 142568, 178210, 356420, 712840.

If you add them up, you will get the total of 713,760. Now subtract 712,840 to get 920,120


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