Q: What is the sum of all factors of the number 405,203,421 excluding 405,203,421?
A: 213,276,323
The factors of the number 405,203,421 are: 1, 3, 7, 21, 613, 1839, 4291, 12873, 31477, 94431, 220339, 661017, 19295401, 57886203, 135067807, 405203421.
If you add them up, you will get the total of 405,203,634. Now subtract 405,203,421 to get 213,276,323