Q: What is the sum of all factors of the number 3,780 excluding 3,780?
A: 9,660
The factors of the number 3,780 are: 1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 30, 35, 36, 42, 45, 54, 60, 63, 70, 84, 90, 105, 108, 126, 135, 140, 180, 189, 210, 252, 270, 315, 378, 420, 540, 630, 756, 945, 1260, 1890, 3780.
If you add them up, you will get the total of 3,789. Now subtract 3,780 to get 9,660