The factors of the number 12,816,144 are: 1, 2, 3, 4, 6, 8, 9, 11, 12, 16, 18, 22, 24, 27, 29, 31, 33, 36, 44, 48, 54, 58, 62, 66, 72, 81, 87, 88, 93, 99, 108, 116, 124, 132, 144, 162, 174, 176, 186, 198, 216, 232, 248, 261, 264, 279, 297, 319, 324, 341, 348, 372, 396, 432, 464, 496, 522, 528, 558, 594, 638, 648, 682, 696, 744, 783, 792, 837, 891, 899, 957, 1023, 1044, 1116, 1188, 1276, 1296, 1364, 1392, 1488, 1566, 1584, 1674, 1782, 1798, 1914, 2046, 2088, 2232, 2349, 2376, 2511, 2552, 2697, 2728, 2871, 3069, 3132, 3348, 3564, 3596, 3828, 4092, 4176, 4464, 4698, 4752, 5022, 5104, 5394, 5456, 5742, 6138, 6264, 6696, 7128, 7192, 7656, 8091, 8184, 8613, 9207, 9396, 9889, 10044, 10788, 11484, 12276, 12528, 13392, 14256, 14384, 15312, 16182, 16368, 17226, 18414, 18792, 19778, 20088, 21576, 22968, 24273, 24552, 25839, 27621, 29667, 32364, 34452, 36828, 37584, 39556, 40176, 43152, 45936, 48546, 49104, 51678, 55242, 59334, 64728, 68904, 72819, 73656, 79112, 89001, 97092, 103356, 110484, 118668, 129456, 137808, 145638, 147312, 158224, 178002, 194184, 206712, 220968, 237336, 267003, 291276, 356004, 388368, 413424, 441936, 474672, 534006, 582552, 712008, 801009, 1068012, 1165104, 1424016, 1602018, 2136024, 3204036, 4272048, 6408072, 12816144.
If you add them up, you will get the total of 43,211,520.