Q: What is the sum of all factors of the number 421,211,121 excluding 421,211,121?

A: 178,639,887

Why is 178,639,887 the sum of all factors of 421,211,121, excluding 421,211,121?

The factors of the number 421,211,121 are: 1, 3, 23, 69, 71, 127, 213, 381, 677, 1633, 2031, 2921, 4899, 8763, 9017, 15571, 27051, 46713, 48067, 85979, 144201, 207391, 257937, 622173, 1105541, 1977517, 3316623, 5932551, 6104509, 18313527, 140403707, 421211121.

If you add them up, you will get the total of 421,211,299. Now subtract 421,211,121 to get 178,639,887