Q: What is the sum of all factors of the number 122,880 excluding 122,880?

A: 270,312

Why is 270,312 the sum of all factors of 122,880, excluding 122,880?

The factors of the number 122,880 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 80, 96, 120, 128, 160, 192, 240, 256, 320, 384, 480, 512, 640, 768, 960, 1024, 1280, 1536, 1920, 2048, 2560, 3072, 3840, 4096, 5120, 6144, 7680, 8192, 10240, 12288, 15360, 20480, 24576, 30720, 40960, 61440, 122880.

If you add them up, you will get the total of 123,150. Now subtract 122,880 to get 270,312