Q: What is the sum of all factors of the number 1,289,500 excluding 1,289,500?

Why is 1,527,860 the sum of all factors of 1,289,500, excluding 1,289,500?

The factors of the number 1,289,500 are: 1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500, 2579, 5158, 10316, 12895, 25790, 51580, 64475, 128950, 257900, 322375, 644750, 1289500.

If you add them up, you will get the total of 1,289,501. Now subtract 1,289,500 to get 1,527,860

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