Q: What is the sum of all factors of the number 640,257 excluding 640,257?

 A: 217,119

Why is 217,119 the sum of all factors of 640,257, excluding 640,257?

The factors of the number 640,257 are: 1, 3, 457, 467, 1371, 1401, 213419, 640257.

If you add them up, you will get the total of 640,474. Now subtract 640,257 to get 217,119


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