Q: What is the sum of all factors of the number 21,120,561 excluding 21,120,561?
A: 17,893,839
The factors of the number 21,120,561 are: 1, 3, 7, 9, 11, 21, 27, 33, 63, 77, 99, 189, 231, 297, 693, 2079, 10159, 30477, 71113, 91431, 111749, 213339, 274293, 335247, 640017, 782243, 1005741, 1920051, 2346729, 3017223, 7040187, 21120561.
If you add them up, you will get the total of 21,120,578. Now subtract 21,120,561 to get 17,893,839