The factors of the number 12,748,560 are: 1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 16, 20, 22, 24, 30, 33, 40, 44, 48, 55, 60, 66, 80, 88, 110, 120, 121, 132, 165, 176, 220, 240, 242, 264, 330, 363, 439, 440, 484, 528, 605, 660, 726, 878, 880, 968, 1210, 1317, 1320, 1452, 1756, 1815, 1936, 2195, 2420, 2634, 2640, 2904, 3512, 3630, 4390, 4829, 4840, 5268, 5808, 6585, 7024, 7260, 8780, 9658, 9680, 10536, 13170, 14487, 14520, 17560, 19316, 21072, 24145, 26340, 28974, 29040, 35120, 38632, 48290, 52680, 53119, 57948, 72435, 77264, 96580, 105360, 106238, 115896, 144870, 159357, 193160, 212476, 231792, 265595, 289740, 318714, 386320, 424952, 531190, 579480, 637428, 796785, 849904, 1062380, 1158960, 1274856, 1593570, 2124760, 2549712, 3187140, 4249520, 6374280, 12748560.
If you add them up, you will get the total of 43,538,880.