Q: What is the sum of all factors of the number 640,020,438 excluding 640,020,438?
A: 747,552,450
The factors of the number 640,020,438 are: 1, 2, 3, 6, 9, 18, 1747, 3494, 5241, 10482, 15723, 20353, 31446, 40706, 61059, 122118, 183177, 366354, 35556691, 71113382, 106670073, 213340146, 320010219, 640020438.
If you add them up, you will get the total of 640,021,185. Now subtract 640,020,438 to get 747,552,450