The factors of the number 15,339,456 are: 1, 2, 3, 4, 6, 8, 9, 11, 12, 16, 18, 22, 24, 27, 32, 33, 36, 44, 48, 54, 64, 66, 72, 81, 88, 96, 99, 108, 132, 144, 162, 176, 192, 198, 216, 264, 269, 288, 297, 324, 352, 396, 432, 528, 538, 576, 594, 648, 704, 792, 807, 864, 891, 1056, 1076, 1188, 1296, 1584, 1614, 1728, 1782, 2112, 2152, 2376, 2421, 2592, 2959, 3168, 3228, 3564, 4304, 4752, 4842, 5184, 5918, 6336, 6456, 7128, 7263, 8608, 8877, 9504, 9684, 11836, 12912, 14256, 14526, 17216, 17754, 19008, 19368, 21789, 23672, 25824, 26631, 28512, 29052, 35508, 38736, 43578, 47344, 51648, 53262, 57024, 58104, 71016, 77472, 79893, 87156, 94688, 106524, 116208, 142032, 154944, 159786, 174312, 189376, 213048, 232416, 239679, 284064, 319572, 348624, 426096, 464832, 479358, 568128, 639144, 697248, 852192, 958716, 1278288, 1394496, 1704384, 1917432, 2556576, 3834864, 5113152, 7669728, 15339456.
If you add them up, you will get the total of 49,789,080.