Q: What is the sum of all factors of the number 641,990 excluding 641,990?
A: 541,258
The factors of the number 641,990 are: 1, 2, 5, 10, 43, 86, 215, 430, 1493, 2986, 7465, 14930, 64199, 128398, 320995, 641990.
If you add them up, you will get the total of 642,531. Now subtract 641,990 to get 541,258