The factors of the number 3,912,480 are: 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 15, 16, 18, 19, 20, 22, 24, 26, 30, 32, 33, 36, 38, 39, 40, 44, 45, 48, 52, 55, 57, 60, 65, 66, 72, 76, 78, 80, 88, 90, 95, 96, 99, 104, 110, 114, 117, 120, 130, 132, 143, 144, 152, 156, 160, 165, 171, 176, 180, 190, 195, 198, 208, 209, 220, 228, 234, 240, 247, 260, 264, 285, 286, 288, 304, 312, 330, 342, 352, 360, 380, 390, 396, 416, 418, 429, 440, 456, 468, 480, 494, 495, 520, 528, 570, 572, 585, 608, 624, 627, 660, 684, 715, 720, 741, 760, 780, 792, 836, 855, 858, 880, 912, 936, 988, 990, 1040, 1045, 1056, 1140, 1144, 1170, 1235, 1248, 1254, 1287, 1320, 1368, 1430, 1440, 1482, 1520, 1560, 1584, 1672, 1710, 1716, 1760, 1824, 1872, 1881, 1976, 1980, 2080, 2090, 2145, 2223, 2280, 2288, 2340, 2470, 2508, 2574, 2640, 2717, 2736, 2860, 2964, 3040, 3120, 3135, 3168, 3344, 3420, 3432, 3705, 3744, 3762, 3952, 3960, 4180, 4290, 4446, 4560, 4576, 4680, 4940, 5016, 5148, 5280, 5434, 5472, 5720, 5928, 6240, 6270, 6435, 6688, 6840, 6864, 7410, 7524, 7904, 7920, 8151, 8360, 8580, 8892, 9120, 9360, 9405, 9880, 10032, 10296, 10868, 11115, 11440, 11856, 12540, 12870, 13585, 13680, 13728, 14820, 15048, 15840, 16302, 16720, 17160, 17784, 18720, 18810, 19760, 20064, 20592, 21736, 22230, 22880, 23712, 24453, 25080, 25740, 27170, 27360, 29640, 30096, 32604, 33440, 34320, 35568, 37620, 39520, 40755, 41184, 43472, 44460, 48906, 50160, 51480, 54340, 59280, 60192, 65208, 68640, 71136, 75240, 81510, 86944, 88920, 97812, 100320, 102960, 108680, 118560, 122265, 130416, 150480, 163020, 177840, 195624, 205920, 217360, 244530, 260832, 300960, 326040, 355680, 391248, 434720, 489060, 652080, 782496, 978120, 1304160, 1956240, 3912480.
If you add them up, you will get the total of 16,511,040.