Q: What is the sum of all factors of the number 731,970 excluding 731,970?

Why is 1,220,670 the sum of all factors of 731,970, excluding 731,970?

The factors of the number 731,970 are: 1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 90, 135, 270, 2711, 5422, 8133, 13555, 16266, 24399, 27110, 40665, 48798, 73197, 81330, 121995, 146394, 243990, 365985, 731970.

If you add them up, you will get the total of 731,971. Now subtract 731,970 to get 1,220,670

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