The factors of the number 657,234,256 are: 1, 2, 4, 7, 8, 14, 16, 28, 37, 49, 56, 74, 98, 112, 139, 148, 163, 196, 259, 278, 296, 326, 392, 518, 556, 592, 652, 784, 973, 1036, 1112, 1141, 1304, 1813, 1946, 2072, 2224, 2282, 2608, 3626, 3892, 4144, 4564, 5143, 6031, 6811, 7252, 7784, 7987, 9128, 10286, 12062, 13622, 14504, 15568, 15974, 18256, 20572, 22657, 24124, 27244, 29008, 31948, 36001, 41144, 42217, 45314, 48248, 54488, 63896, 72002, 82288, 84434, 90628, 96496, 108976, 127792, 144004, 158599, 168868, 181256, 252007, 288008, 295519, 317198, 337736, 362512, 504014, 576016, 591038, 634396, 675472, 838309, 1008028, 1110193, 1182076, 1268792, 1676618, 2016056, 2220386, 2364152, 2537584, 3353236, 4032112, 4440772, 4728304, 5868163, 6706472, 8881544, 11736326, 13412944, 17763088, 23472652, 41077141, 46945304, 82154282, 93890608, 164308564, 328617128, 657234256.
If you add them up, you will get the total of 1,541,672,160.