Q: What is the sum of all factors of the number 6,440 including 6,440?
A: 17,280
The factors of the number 6,440 are: 1, 2, 4, 5, 7, 8, 10, 14, 20, 23, 28, 35, 40, 46, 56, 70, 92, 115, 140, 161, 184, 230, 280, 322, 460, 644, 805, 920, 1288, 1610, 3220, 6440.
If you add them up, you will get the total of 17,280.