The factors of the number 1,577,520 are: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 48, 56, 60, 63, 70, 72, 80, 84, 90, 105, 112, 120, 126, 140, 144, 168, 180, 210, 240, 252, 280, 313, 315, 336, 360, 420, 504, 560, 626, 630, 720, 840, 939, 1008, 1252, 1260, 1565, 1680, 1878, 2191, 2504, 2520, 2817, 3130, 3756, 4382, 4695, 5008, 5040, 5634, 6260, 6573, 7512, 8764, 9390, 10955, 11268, 12520, 13146, 14085, 15024, 17528, 18780, 19719, 21910, 22536, 25040, 26292, 28170, 32865, 35056, 37560, 39438, 43820, 45072, 52584, 56340, 65730, 75120, 78876, 87640, 98595, 105168, 112680, 131460, 157752, 175280, 197190, 225360, 262920, 315504, 394380, 525840, 788760, 1577520.
If you add them up, you will get the total of 6,074,016.