The factors of the number 12,615,408 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, 184, 207, 208, 234, 276, 293, 299, 312, 368, 414, 468, 552, 586, 598, 624, 828, 879, 897, 936, 1104, 1172, 1196, 1656, 1758, 1794, 1872, 2344, 2392, 2637, 2691, 3312, 3516, 3588, 3809, 4688, 4784, 5274, 5382, 6739, 7032, 7176, 7618, 10548, 10764, 11427, 13478, 14064, 14352, 15236, 20217, 21096, 21528, 22854, 26956, 30472, 34281, 40434, 42192, 43056, 45708, 53912, 60651, 60944, 68562, 80868, 87607, 91416, 107824, 121302, 137124, 161736, 175214, 182832, 242604, 262821, 274248, 323472, 350428, 485208, 525642, 548496, 700856, 788463, 970416, 1051284, 1401712, 1576926, 2102568, 3153852, 4205136, 6307704, 12615408.
If you add them up, you will get the total of 39,809,952.