Q: What is the sum of all factors of the number 315,640 excluding 315,640?

 A: 450,440

Why is 450,440 the sum of all factors of 315,640, excluding 315,640?

The factors of the number 315,640 are: 1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 607, 1214, 2428, 3035, 4856, 6070, 7891, 12140, 15782, 24280, 31564, 39455, 63128, 78910, 157820, 315640.

If you add them up, you will get the total of 316,090. Now subtract 315,640 to get 450,440


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