Q: What is the sum of all factors of the number 1,785 excluding 1,785?
A: 1,671
The factors of the number 1,785 are: 1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 105, 119, 255, 357, 595, 1785.
If you add them up, you will get the total of 1,786. Now subtract 1,785 to get 1,671