Q: What is the sum of all factors of the number 21,385 excluding 21,385?
A: 10,871
The factors of the number 21,385 are: 1, 5, 7, 13, 35, 47, 65, 91, 235, 329, 455, 611, 1645, 3055, 4277, 21385.
If you add them up, you will get the total of 21,395. Now subtract 21,385 to get 10,871