Q: What is the sum of all factors of the number 392,640 excluding 392,640?

A: 857,040

Why is 857,040 the sum of all factors of 392,640, excluding 392,640?

The factors of the number 392,640 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 80, 96, 120, 160, 192, 240, 320, 409, 480, 818, 960, 1227, 1636, 2045, 2454, 3272, 4090, 4908, 6135, 6544, 8180, 9816, 12270, 13088, 16360, 19632, 24540, 26176, 32720, 39264, 49080, 65440, 78528, 98160, 130880, 196320, 392640.

If you add them up, you will get the total of 393,497. Now subtract 392,640 to get 857,040