Q: What is the sum of all factors of the number 4,389 including 4,389?
A: 7,680
The factors of the number 4,389 are: 1, 3, 7, 11, 19, 21, 33, 57, 77, 133, 209, 231, 399, 627, 1463, 4389.
If you add them up, you will get the total of 7,680.