Q: What is the sum of all factors of the number 90,240 excluding 90,240?

A: 203,520

Why is 203,520 the sum of all factors of 90,240, excluding 90,240?

The factors of the number 90,240 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 47, 48, 60, 64, 80, 94, 96, 120, 128, 141, 160, 188, 192, 235, 240, 282, 320, 376, 384, 470, 480, 564, 640, 705, 752, 940, 960, 1128, 1410, 1504, 1880, 1920, 2256, 2820, 3008, 3760, 4512, 5640, 6016, 7520, 9024, 11280, 15040, 18048, 22560, 30080, 45120, 90240.

If you add them up, you will get the total of 90,443. Now subtract 90,240 to get 203,520