Q: What is the sum of all factors of the number 12,987 including 12,987?
A: 21,280
The factors of the number 12,987 are: 1, 3, 9, 13, 27, 37, 39, 111, 117, 333, 351, 481, 999, 1443, 4329, 12987.
If you add them up, you will get the total of 21,280.