The factors of the number 8,426,418 are: 1, 2, 3, 6, 7, 11, 13, 14, 21, 22, 23, 26, 33, 39, 42, 46, 61, 66, 69, 77, 78, 91, 122, 138, 143, 154, 161, 182, 183, 231, 253, 273, 286, 299, 322, 366, 427, 429, 462, 483, 506, 546, 598, 671, 759, 793, 854, 858, 897, 966, 1001, 1281, 1342, 1403, 1518, 1586, 1771, 1794, 2002, 2013, 2093, 2379, 2562, 2806, 3003, 3289, 3542, 4026, 4186, 4209, 4697, 4758, 5313, 5551, 6006, 6279, 6578, 8418, 8723, 9394, 9821, 9867, 10626, 11102, 12558, 14091, 15433, 16653, 17446, 18239, 19642, 19734, 23023, 26169, 28182, 29463, 30866, 33306, 36478, 46046, 46299, 52338, 54717, 58926, 61061, 69069, 92598, 108031, 109434, 122122, 127673, 138138, 183183, 200629, 216062, 255346, 324093, 366366, 383019, 401258, 601887, 648186, 766038, 1203774, 1404403, 2808806, 4213209, 8426418.
If you add them up, you will get the total of 8,426,433. Now subtract 8,426,418 to get 15,572,046