Q: What is the sum of all factors of the number 1,071 excluding 1,071?
A: 801
The factors of the number 1,071 are: 1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071.
If you add them up, you will get the total of 1,872. Now subtract 1,071 to get 801