Q: What is the sum of all factors of the number 18,351,380 excluding 18,351,380?

Why is 21,431,020 the sum of all factors of 18,351,380, excluding 18,351,380?

The factors of the number 18,351,380 are: 1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 29599, 59198, 118396, 147995, 295990, 591980, 917569, 1835138, 3670276, 4587845, 9175690, 18351380.

If you add them up, you will get the total of 18,351,401. Now subtract 18,351,380 to get 21,431,020

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