The factors of the number 12,873,744 are: 1, 2, 3, 4, 6, 8, 9, 12, 13, 16, 18, 23, 24, 26, 36, 39, 46, 48, 52, 69, 72, 78, 92, 104, 117, 138, 144, 156, 169, 184, 207, 208, 234, 276, 299, 312, 338, 368, 414, 468, 507, 529, 552, 598, 624, 676, 828, 897, 936, 1014, 1058, 1104, 1196, 1352, 1521, 1587, 1656, 1794, 1872, 2028, 2116, 2392, 2691, 2704, 3042, 3174, 3312, 3588, 3887, 4056, 4232, 4761, 4784, 5382, 6084, 6348, 6877, 7176, 7774, 8112, 8464, 9522, 10764, 11661, 12168, 12696, 13754, 14352, 15548, 19044, 20631, 21528, 23322, 24336, 25392, 27508, 31096, 34983, 38088, 41262, 43056, 46644, 55016, 61893, 62192, 69966, 76176, 82524, 89401, 93288, 110032, 123786, 139932, 165048, 178802, 186576, 247572, 268203, 279864, 330096, 357604, 495144, 536406, 559728, 715208, 804609, 990288, 1072812, 1430416, 1609218, 2145624, 3218436, 4291248, 6436872, 12873744.
If you add them up, you will get the total of 40,783,197.