Q: What is the sum of all factors of the number 131,440,320 excluding 131,440,320?

Why is 379,727,568 the sum of all factors of 131,440,320, excluding 131,440,320?

The factors of the number 131,440,320 are: 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 18, 20, 22, 24, 27, 30, 32, 33, 36, 40, 44, 45, 48, 54, 55, 60, 64, 66, 72, 80, 81, 88, 90, 96, 99, 108, 110, 120, 132, 135, 144, 160, 162, 165, 176, 180, 192, 198, 216, 220, 240, 264, 270, 288, 297, 320, 324, 330, 352, 360, 396, 405, 432, 440, 461, 480, 495, 528, 540, 576, 594, 648, 660, 704, 720, 792, 810, 864, 880, 891, 922, 960, 990, 1056, 1080, 1188, 1296, 1320, 1383, 1440, 1485, 1584, 1620, 1728, 1760, 1782, 1844, 1980, 2112, 2160, 2305, 2376, 2592, 2640, 2766, 2880, 2970, 3168, 3240, 3520, 3564, 3688, 3960, 4149, 4320, 4455, 4610, 4752, 5071, 5184, 5280, 5532, 5940, 6336, 6480, 6915, 7128, 7376, 7920, 8298, 8640, 8910, 9220, 9504, 10142, 10560, 11064, 11880, 12447, 12960, 13830, 14256, 14752, 15213, 15840, 16596, 17820, 18440, 19008, 20284, 20745, 22128, 23760, 24894, 25355, 25920, 27660, 28512, 29504, 30426, 31680, 33192, 35640, 36880, 37341, 40568, 41490, 44256, 45639, 47520, 49788, 50710, 55320, 57024, 60852, 62235, 66384, 71280, 73760, 74682, 76065, 81136, 82980, 88512, 91278, 95040, 99576, 101420, 110640, 121704, 124470, 132768, 136917, 142560, 147520, 149364, 152130, 162272, 165960, 182556, 186705, 199152, 202840, 221280, 228195, 243408, 248940, 265536, 273834, 285120, 298728, 304260, 324544, 331920, 365112, 373410, 398304, 405680, 410751, 442560, 456390, 486816, 497880, 547668, 597456, 608520, 663840, 684585, 730224, 746820, 796608, 811360, 821502, 912780, 973632, 995760, 1095336, 1194912, 1217040, 1327680, 1369170, 1460448, 1493640, 1622720, 1643004, 1825560, 1991520, 2053755, 2190672, 2389824, 2434080, 2738340, 2920896, 2987280, 3286008, 3651120, 3983040, 4107510, 4381344, 4868160, 5476680, 5974560, 6572016, 7302240, 8215020, 8762688, 10953360, 11949120, 13144032, 14604480, 16430040, 21906720, 26288064, 32860080, 43813440, 65720160, 131440320.

If you add them up, you will get the total of 131,440,699. Now subtract 131,440,320 to get 379,727,568

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