Q: What is the sum of all factors of the number 640,306 excluding 640,306?

 A: 320,156

Why is 320,156 the sum of all factors of 640,306, excluding 640,306?

The factors of the number 640,306 are: 1, 2, 320153, 640306.

If you add them up, you will get the total of 640,626. Now subtract 640,306 to get 320,156


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