Q: What is the sum of all factors of the number 309,721 excluding 309,721?

 A: 16,423

Why is 16,423 the sum of all factors of 309,721, excluding 309,721?

The factors of the number 309,721 are: 1, 31, 97, 103, 3007, 3193, 9991, 309721.

If you add them up, you will get the total of 309,737. Now subtract 309,721 to get 16,423


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