Q: What is the sum of all factors of the number 640,975 excluding 640,975?

 A: 153,865

Why is 153,865 the sum of all factors of 640,975, excluding 640,975?

The factors of the number 640,975 are: 1, 5, 25, 25639, 128195, 640975.

If you add them up, you will get the total of 641,128. Now subtract 640,975 to get 153,865


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