Q: What is the sum of all factors of the number 256,780 excluding 256,780?

 A: 298,628

Why is 298,628 the sum of all factors of 256,780, excluding 256,780?

The factors of the number 256,780 are: 1, 2, 4, 5, 10, 20, 37, 74, 148, 185, 347, 370, 694, 740, 1388, 1735, 3470, 6940, 12839, 25678, 51356, 64195, 128390, 256780.

If you add them up, you will get the total of 257,078. Now subtract 256,780 to get 298,628


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