Q: What is the sum of all factors of the number 4,221,021 excluding 4,221,021?
A: 2,690,979
The factors of the number 4,221,021 are: 1, 3, 7, 19, 21, 57, 71, 133, 149, 213, 399, 447, 497, 1043, 1349, 1491, 2831, 3129, 4047, 8493, 9443, 10579, 19817, 28329, 31737, 59451, 74053, 201001, 222159, 603003, 1407007, 4221021.
If you add them up, you will get the total of 4,221,023. Now subtract 4,221,021 to get 2,690,979