Q: What is the sum of all factors of the number 1,284 excluding 1,284?

 A: 1,740

Why is 1,740 the sum of all factors of 1,284, excluding 1,284?

The factors of the number 1,284 are: 1, 2, 3, 4, 6, 12, 107, 214, 321, 428, 642, 1284.

If you add them up, you will get the total of 1,285. Now subtract 1,284 to get 1,740


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