Q: What is the sum of all factors of the number 3,969 excluding 3,969?
A: 2,928
The factors of the number 3,969 are: 1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 441, 567, 1323, 3969.
If you add them up, you will get the total of 3,971. Now subtract 3,969 to get 2,928