The factors of the number 780,761,376 are: 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 19, 24, 27, 32, 36, 38, 48, 54, 57, 72, 76, 96, 108, 114, 144, 152, 171, 199, 216, 228, 239, 288, 304, 342, 398, 432, 456, 478, 513, 597, 608, 684, 717, 796, 864, 912, 956, 1026, 1194, 1368, 1434, 1592, 1791, 1824, 1912, 2052, 2151, 2388, 2736, 2868, 3184, 3582, 3781, 3824, 4104, 4302, 4541, 4776, 5373, 5472, 5736, 6368, 6453, 7164, 7562, 7648, 8208, 8604, 9082, 9552, 10746, 11343, 11472, 12906, 13623, 14328, 15124, 16416, 17208, 18164, 19104, 21492, 22686, 22944, 25812, 27246, 28656, 30248, 34029, 34416, 36328, 40869, 42984, 45372, 47561, 51624, 54492, 57312, 60496, 68058, 68832, 72656, 81738, 85968, 90744, 95122, 102087, 103248, 108984, 120992, 122607, 136116, 142683, 145312, 163476, 171936, 181488, 190244, 204174, 206496, 217968, 245214, 272232, 285366, 326952, 362976, 380488, 408348, 428049, 435936, 490428, 544464, 570732, 653904, 760976, 816696, 856098, 903659, 980856, 1088928, 1141464, 1284147, 1307808, 1521952, 1633392, 1712196, 1807318, 1961712, 2282928, 2568294, 2710977, 3266784, 3424392, 3614636, 3923424, 4565856, 5136588, 5421954, 6848784, 7229272, 8132931, 10273176, 10843908, 13697568, 14458544, 16265862, 20546352, 21687816, 24398793, 28917088, 32531724, 41092704, 43375632, 48797586, 65063448, 86751264, 97595172, 130126896, 195190344, 260253792, 390380688, 780761376.
If you add them up, you will get the total of 780,761,377. Now subtract 780,761,376 to get 1,638,438,624