The factors of the number 521,320,128 are: 1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 21, 24, 28, 32, 42, 48, 56, 64, 84, 96, 112, 168, 192, 224, 336, 337, 448, 672, 674, 1011, 1151, 1344, 1348, 2022, 2302, 2359, 2696, 3453, 4044, 4604, 4718, 5392, 6906, 7077, 8057, 8088, 9208, 9436, 10784, 13812, 14154, 16114, 16176, 18416, 18872, 21568, 24171, 27624, 28308, 32228, 32352, 36832, 37744, 48342, 55248, 56616, 64456, 64704, 73664, 75488, 96684, 110496, 113232, 128912, 150976, 193368, 220992, 226464, 257824, 386736, 387887, 452928, 515648, 773472, 775774, 1163661, 1546944, 1551548, 2327322, 2715209, 3103096, 4654644, 5430418, 6206192, 8145627, 9309288, 10860836, 12412384, 16291254, 18618576, 21721672, 24824768, 32582508, 37237152, 43443344, 65165016, 74474304, 86886688, 130330032, 173773376, 260660064, 521320128.
If you add them up, you will get the total of 521,320,129. Now subtract 521,320,128 to get 1,061,103,936