Q: What is the sum of all factors of the number 421,660 excluding 421,660?

 A: 495,620

Why is 495,620 the sum of all factors of 421,660, excluding 421,660?

The factors of the number 421,660 are: 1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580, 727, 1454, 2908, 3635, 7270, 14540, 21083, 42166, 84332, 105415, 210830, 421660.

If you add them up, you will get the total of 422,155. Now subtract 421,660 to get 495,620


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