The factors of the number 3,242,400 are: 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 25, 28, 30, 32, 35, 40, 42, 48, 50, 56, 60, 70, 75, 80, 84, 96, 100, 105, 112, 120, 140, 150, 160, 168, 175, 193, 200, 210, 224, 240, 280, 300, 336, 350, 386, 400, 420, 480, 525, 560, 579, 600, 672, 700, 772, 800, 840, 965, 1050, 1120, 1158, 1200, 1351, 1400, 1544, 1680, 1930, 2100, 2316, 2400, 2702, 2800, 2895, 3088, 3360, 3860, 4053, 4200, 4632, 4825, 5404, 5600, 5790, 6176, 6755, 7720, 8106, 8400, 9264, 9650, 10808, 11580, 13510, 14475, 15440, 16212, 16800, 18528, 19300, 20265, 21616, 23160, 27020, 28950, 30880, 32424, 33775, 38600, 40530, 43232, 46320, 54040, 57900, 64848, 67550, 77200, 81060, 92640, 101325, 108080, 115800, 129696, 135100, 154400, 162120, 202650, 216160, 231600, 270200, 324240, 405300, 463200, 540400, 648480, 810600, 1080800, 1621200, 3242400.
If you add them up, you will get the total of 12,124,224.