The factors of the number 320,343,040 are: 1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 37, 38, 40, 64, 74, 76, 80, 89, 95, 128, 148, 152, 160, 178, 185, 190, 256, 296, 304, 320, 356, 370, 380, 445, 512, 592, 608, 640, 703, 712, 740, 760, 890, 1024, 1184, 1216, 1280, 1406, 1424, 1480, 1520, 1691, 1780, 2368, 2432, 2560, 2812, 2848, 2960, 3040, 3293, 3382, 3515, 3560, 4736, 4864, 5120, 5624, 5696, 5920, 6080, 6586, 6764, 7030, 7120, 8455, 9472, 9728, 11248, 11392, 11840, 12160, 13172, 13528, 14060, 14240, 16465, 16910, 18944, 19456, 22496, 22784, 23680, 24320, 26344, 27056, 28120, 28480, 32930, 33820, 37888, 44992, 45568, 47360, 48640, 52688, 54112, 56240, 56960, 62567, 65860, 67640, 89984, 91136, 94720, 97280, 105376, 108224, 112480, 113920, 125134, 131720, 135280, 179968, 189440, 210752, 216448, 224960, 227840, 250268, 263440, 270560, 312835, 359936, 421504, 432896, 449920, 455680, 500536, 526880, 541120, 625670, 719872, 843008, 865792, 899840, 1001072, 1053760, 1082240, 1251340, 1686016, 1731584, 1799680, 2002144, 2107520, 2164480, 2502680, 3372032, 3599360, 4004288, 4215040, 4328960, 5005360, 8008576, 8430080, 8657920, 10010720, 16017152, 16860160, 20021440, 32034304, 40042880, 64068608, 80085760, 160171520, 320343040.
If you add them up, you will get the total of 840,088,800.