The factors of the number 15,751,320 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 23, 24, 26, 30, 39, 40, 46, 52, 60, 65, 69, 78, 92, 104, 115, 120, 130, 138, 156, 184, 195, 230, 260, 276, 299, 312, 345, 390, 439, 460, 520, 552, 598, 690, 780, 878, 897, 920, 1196, 1317, 1380, 1495, 1560, 1756, 1794, 2195, 2392, 2634, 2760, 2990, 3512, 3588, 4390, 4485, 5268, 5707, 5980, 6585, 7176, 8780, 8970, 10097, 10536, 11414, 11960, 13170, 17121, 17560, 17940, 20194, 22828, 26340, 28535, 30291, 34242, 35880, 40388, 45656, 50485, 52680, 57070, 60582, 68484, 80776, 85605, 100970, 114140, 121164, 131261, 136968, 151455, 171210, 201940, 228280, 242328, 262522, 302910, 342420, 393783, 403880, 525044, 605820, 656305, 684840, 787566, 1050088, 1211640, 1312610, 1575132, 1968915, 2625220, 3150264, 3937830, 5250440, 7875660, 15751320.
If you add them up, you will get the total of 53,222,400.