Q: What is the sum of all factors of the number 645,872 excluding 645,872?
A: 640,504
The factors of the number 645,872 are: 1, 2, 4, 8, 16, 37, 74, 148, 296, 592, 1091, 2182, 4364, 8728, 17456, 40367, 80734, 161468, 322936, 645872.
If you add them up, you will get the total of 646,512. Now subtract 645,872 to get 640,504