Q: What is the sum of all factors of the number 640,075 excluding 640,075?

 A: 153,649

Why is 153,649 the sum of all factors of 640,075, excluding 640,075?

The factors of the number 640,075 are: 1, 5, 25, 25603, 128015, 640075.

If you add them up, you will get the total of 640,228. Now subtract 640,075 to get 153,649


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