The factors of the number 3,177,720 are: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 18, 20, 21, 24, 26, 28, 30, 35, 36, 39, 40, 42, 45, 52, 56, 60, 63, 65, 70, 72, 78, 84, 90, 91, 97, 104, 105, 117, 120, 126, 130, 140, 156, 168, 180, 182, 194, 195, 210, 234, 252, 260, 273, 280, 291, 312, 315, 360, 364, 388, 390, 420, 455, 468, 485, 504, 520, 546, 582, 585, 630, 679, 728, 776, 780, 819, 840, 873, 910, 936, 970, 1092, 1164, 1170, 1260, 1261, 1358, 1365, 1455, 1560, 1638, 1746, 1820, 1940, 2037, 2184, 2328, 2340, 2520, 2522, 2716, 2730, 2910, 3276, 3395, 3492, 3640, 3783, 3880, 4074, 4095, 4365, 4680, 5044, 5432, 5460, 5820, 6111, 6305, 6552, 6790, 6984, 7566, 8148, 8190, 8730, 8827, 10088, 10185, 10920, 11349, 11640, 12222, 12610, 13580, 15132, 16296, 16380, 17460, 17654, 18915, 20370, 22698, 24444, 25220, 26481, 27160, 30264, 30555, 32760, 34920, 35308, 37830, 40740, 44135, 45396, 48888, 50440, 52962, 56745, 61110, 70616, 75660, 79443, 81480, 88270, 90792, 105924, 113490, 122220, 132405, 151320, 158886, 176540, 211848, 226980, 244440, 264810, 317772, 353080, 397215, 453960, 529620, 635544, 794430, 1059240, 1588860, 3177720.
If you add them up, you will get the total of 12,841,920.