The factors of the number 243,251,424 are: 1, 2, 3, 4, 6, 8, 9, 12, 13, 16, 18, 24, 26, 27, 32, 36, 39, 48, 52, 54, 72, 78, 81, 96, 104, 108, 117, 144, 156, 162, 208, 216, 234, 288, 312, 324, 351, 416, 432, 468, 624, 648, 702, 864, 936, 1053, 1248, 1296, 1404, 1872, 2106, 2592, 2808, 3744, 4212, 5616, 7219, 8424, 11232, 14438, 16848, 21657, 28876, 33696, 43314, 57752, 64971, 86628, 93847, 115504, 129942, 173256, 187694, 194913, 231008, 259884, 281541, 346512, 375388, 389826, 519768, 563082, 584739, 693024, 750776, 779652, 844623, 1039536, 1126164, 1169478, 1501552, 1559304, 1689246, 2079072, 2252328, 2338956, 2533869, 3003104, 3118608, 3378492, 4504656, 4677912, 5067738, 6237216, 6756984, 7601607, 9009312, 9355824, 10135476, 13513968, 15203214, 18711648, 20270952, 27027936, 30406428, 40541904, 60812856, 81083808, 121625712, 243251424.
If you add them up, you will get the total of 770,532,840.