Q: What is the sum of all factors of the number 1,845 excluding 1,845?

 A: 1,431

Why is 1,431 the sum of all factors of 1,845, excluding 1,845?

The factors of the number 1,845 are: 1, 3, 5, 9, 15, 41, 45, 123, 205, 369, 615, 1845.

If you add them up, you will get the total of 1,846. Now subtract 1,845 to get 1,431


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