The factors of the number 277,477,760 are: 1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 128, 140, 160, 224, 241, 257, 280, 320, 448, 482, 514, 560, 640, 896, 964, 1028, 1120, 1205, 1285, 1687, 1799, 1928, 2056, 2240, 2410, 2570, 3374, 3598, 3856, 4112, 4480, 4820, 5140, 6748, 7196, 7712, 8224, 8435, 8995, 9640, 10280, 13496, 14392, 15424, 16448, 16870, 17990, 19280, 20560, 26992, 28784, 30848, 32896, 33740, 35980, 38560, 41120, 53984, 57568, 61937, 67480, 71960, 77120, 82240, 107968, 115136, 123874, 134960, 143920, 154240, 164480, 215936, 230272, 247748, 269920, 287840, 309685, 433559, 495496, 539840, 575680, 619370, 867118, 990992, 1079680, 1151360, 1238740, 1734236, 1981984, 2167795, 2477480, 3468472, 3963968, 4335590, 4954960, 6936944, 7927936, 8671180, 9909920, 13873888, 17342360, 19819840, 27747776, 34684720, 39639680, 55495552, 69369440, 138738880, 277477760.
If you add them up, you will get the total of 764,216,640.