Q: What is the sum of all factors of the number 21,800 including 21,800?
A: 51,150
The factors of the number 21,800 are: 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 109, 200, 218, 436, 545, 872, 1090, 2180, 2725, 4360, 5450, 10900, 21800.
If you add them up, you will get the total of 51,150.