The factors of the number 315,136,128 are: 1, 2, 3, 4, 6, 8, 12, 16, 19, 24, 32, 38, 47, 48, 57, 64, 76, 94, 96, 114, 128, 141, 152, 188, 192, 228, 282, 304, 376, 384, 456, 564, 608, 752, 893, 912, 919, 1128, 1216, 1504, 1786, 1824, 1838, 2256, 2432, 2679, 2757, 3008, 3572, 3648, 3676, 4512, 5358, 5514, 6016, 7144, 7296, 7352, 9024, 10716, 11028, 14288, 14704, 17461, 18048, 21432, 22056, 28576, 29408, 34922, 42864, 43193, 44112, 52383, 57152, 58816, 69844, 85728, 86386, 88224, 104766, 114304, 117632, 129579, 139688, 171456, 172772, 176448, 209532, 259158, 279376, 342912, 345544, 352896, 419064, 518316, 558752, 691088, 820667, 838128, 1036632, 1117504, 1382176, 1641334, 1676256, 2073264, 2235008, 2462001, 2764352, 3282668, 3352512, 4146528, 4924002, 5528704, 6565336, 6705024, 8293056, 9848004, 13130672, 16586112, 19696008, 26261344, 39392016, 52522688, 78784032, 105045376, 157568064, 315136128.
If you add them up, you will get the total of 900,864,000.