Q: What is the sum of all factors of the number 278,120 excluding 278,120?

 A: 386,080

Why is 386,080 the sum of all factors of 278,120, excluding 278,120?

The factors of the number 278,120 are: 1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 409, 680, 818, 1636, 2045, 3272, 4090, 6953, 8180, 13906, 16360, 27812, 34765, 55624, 69530, 139060, 278120.

If you add them up, you will get the total of 278,506. Now subtract 278,120 to get 386,080


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