Q: What is the sum of all factors of the number 405,504 excluding 405,504?

A: 872,292

Why is 872,292 the sum of all factors of 405,504, excluding 405,504?

The factors of the number 405,504 are: 1, 2, 3, 4, 6, 8, 9, 11, 12, 16, 18, 22, 24, 32, 33, 36, 44, 48, 64, 66, 72, 88, 96, 99, 128, 132, 144, 176, 192, 198, 256, 264, 288, 352, 384, 396, 512, 528, 576, 704, 768, 792, 1024, 1056, 1152, 1408, 1536, 1584, 2048, 2112, 2304, 2816, 3072, 3168, 4096, 4224, 4608, 5632, 6144, 6336, 8448, 9216, 11264, 12288, 12672, 16896, 18432, 22528, 25344, 33792, 36864, 45056, 50688, 67584, 101376, 135168, 202752, 405504.

If you add them up, you will get the total of 406,376. Now subtract 405,504 to get 872,292