Q: What is the sum of all factors of the number 213,213 including 213,213?
A: 387,072
The factors of the number 213,213 are: 1, 3, 7, 11, 13, 21, 33, 39, 71, 77, 91, 143, 213, 231, 273, 429, 497, 781, 923, 1001, 1491, 2343, 2769, 3003, 5467, 6461, 10153, 16401, 19383, 30459, 71071, 213213.
If you add them up, you will get the total of 387,072.