Q: What is the sum of all factors of the number 378,880 excluding 378,880?

A: 554,780

Why is 554,780 the sum of all factors of 378,880, excluding 378,880?

The factors of the number 378,880 are: 1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 64, 74, 80, 128, 148, 160, 185, 256, 296, 320, 370, 512, 592, 640, 740, 1024, 1184, 1280, 1480, 2048, 2368, 2560, 2960, 4736, 5120, 5920, 9472, 10240, 11840, 18944, 23680, 37888, 47360, 75776, 94720, 189440, 378880.

If you add them up, you will get the total of 379,434. Now subtract 378,880 to get 554,780