The factors of the number 15,012,360 are: 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 17, 18, 20, 22, 24, 30, 33, 34, 36, 40, 44, 45, 51, 55, 60, 66, 68, 72, 85, 88, 90, 99, 102, 110, 120, 132, 136, 153, 165, 170, 180, 187, 198, 204, 220, 223, 255, 264, 306, 330, 340, 360, 374, 396, 408, 440, 446, 495, 510, 561, 612, 660, 669, 680, 748, 765, 792, 892, 935, 990, 1020, 1115, 1122, 1224, 1320, 1338, 1496, 1530, 1683, 1784, 1870, 1980, 2007, 2040, 2230, 2244, 2453, 2676, 2805, 3060, 3345, 3366, 3740, 3791, 3960, 4014, 4460, 4488, 4906, 5352, 5610, 6120, 6690, 6732, 7359, 7480, 7582, 8028, 8415, 8920, 9812, 10035, 11220, 11373, 12265, 13380, 13464, 14718, 15164, 16056, 16830, 18955, 19624, 20070, 22077, 22440, 22746, 24530, 26760, 29436, 30328, 33660, 34119, 36795, 37910, 40140, 41701, 44154, 45492, 49060, 56865, 58872, 67320, 68238, 73590, 75820, 80280, 83402, 88308, 90984, 98120, 110385, 113730, 125103, 136476, 147180, 151640, 166804, 170595, 176616, 208505, 220770, 227460, 250206, 272952, 294360, 333608, 341190, 375309, 417010, 441540, 454920, 500412, 625515, 682380, 750618, 834020, 883080, 1000824, 1251030, 1364760, 1501236, 1668040, 1876545, 2502060, 3002472, 3753090, 5004120, 7506180, 15012360.
If you add them up, you will get the total of 56,609,280.