Q: What is the sum of all factors of the number 21,430,250 excluding 21,430,250?

Why is 20,442,646 the sum of all factors of 21,430,250, excluding 21,430,250?

The factors of the number 21,430,250 are: 1, 2, 5, 10, 23, 25, 46, 50, 115, 125, 230, 250, 575, 1150, 2875, 3727, 5750, 7454, 18635, 37270, 85721, 93175, 171442, 186350, 428605, 465875, 857210, 931750, 2143025, 4286050, 10715125, 21430250.

If you add them up, you will get the total of 21,430,270. Now subtract 21,430,250 to get 20,442,646

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