Q: What is the sum of all factors of the number 207,640 excluding 207,640?

 A: 278,360

Why is 278,360 the sum of all factors of 207,640, excluding 207,640?

The factors of the number 207,640 are: 1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 179, 232, 290, 358, 580, 716, 895, 1160, 1432, 1790, 3580, 5191, 7160, 10382, 20764, 25955, 41528, 51910, 103820, 207640.

If you add them up, you will get the total of 207,918. Now subtract 207,640 to get 278,360


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