Q: What is the sum of all factors of the number 19,845 excluding 19,845?
A: 21,537
The factors of the number 19,845 are: 1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 49, 63, 81, 105, 135, 147, 189, 245, 315, 405, 441, 567, 735, 945, 1323, 2205, 2835, 3969, 6615, 19845.
If you add them up, you will get the total of 19,866. Now subtract 19,845 to get 21,537