Q: What is the sum of all factors of the number 668,760 excluding 668,760?

Why is 1,337,880 the sum of all factors of 668,760, excluding 668,760?

The factors of the number 668,760 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 5573, 11146, 16719, 22292, 27865, 33438, 44584, 55730, 66876, 83595, 111460, 133752, 167190, 222920, 334380, 668760.

If you add them up, you will get the total of 668,761. Now subtract 668,760 to get 1,337,880

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