Q: What is the sum of all factors of the number 28,040 excluding 28,040?

A: 35,140

Why is 35,140 the sum of all factors of 28,040, excluding 28,040?

The factors of the number 28,040 are: 1, 2, 4, 5, 8, 10, 20, 40, 701, 1402, 2804, 3505, 5608, 7010, 14020, 28040.

If you add them up, you will get the total of 28,075. Now subtract 28,040 to get 35,140

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