Q: What is the sum of all factors of the number 404,978 excluding 404,978?

Why is 289,294 the sum of all factors of 404,978, excluding 404,978?

The factors of the number 404,978 are: 1, 2, 7, 14, 28927, 57854, 202489, 404978.

If you add them up, you will get the total of 405,267. Now subtract 404,978 to get 289,294

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