The factors of the number 28,440,640 are: 1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 47, 61, 62, 64, 80, 94, 122, 124, 155, 160, 188, 235, 244, 248, 305, 310, 320, 376, 470, 488, 496, 610, 620, 752, 940, 976, 992, 1220, 1240, 1457, 1504, 1880, 1891, 1952, 1984, 2440, 2480, 2867, 2914, 3008, 3760, 3782, 3904, 4880, 4960, 5734, 5828, 7285, 7520, 7564, 9455, 9760, 9920, 11468, 11656, 14335, 14570, 15040, 15128, 18910, 19520, 22936, 23312, 28670, 29140, 30256, 37820, 45872, 46624, 57340, 58280, 60512, 75640, 88877, 91744, 93248, 114680, 116560, 121024, 151280, 177754, 183488, 229360, 233120, 302560, 355508, 444385, 458720, 466240, 605120, 711016, 888770, 917440, 1422032, 1777540, 2844064, 3555080, 5688128, 7110160, 14220320, 28440640.
If you add them up, you will get the total of 72,566,784.