Q: What is the sum of all factors of the number 640,003 excluding 640,003?

 A: 153,485

Why is 153,485 the sum of all factors of 640,003, excluding 640,003?

The factors of the number 640,003 are: 1, 7, 13, 91, 169, 541, 1183, 3787, 7033, 49231, 91429, 640003.

If you add them up, you will get the total of 640,156. Now subtract 640,003 to get 153,485


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