Q: What is the sum of all factors of the number 217,400 excluding 217,400?

 A: 288,520

Why is 288,520 the sum of all factors of 217,400, excluding 217,400?

The factors of the number 217,400 are: 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 1087, 2174, 4348, 5435, 8696, 10870, 21740, 27175, 43480, 54350, 108700, 217400.

If you add them up, you will get the total of 217,688. Now subtract 217,400 to get 288,520


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