The factors of the number 405,277,824 are: 1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 17, 21, 24, 28, 32, 34, 42, 48, 49, 51, 56, 64, 68, 84, 96, 98, 102, 112, 119, 128, 136, 147, 168, 181, 192, 196, 204, 224, 238, 272, 294, 336, 343, 357, 362, 384, 392, 408, 448, 476, 543, 544, 588, 672, 686, 714, 724, 784, 816, 833, 896, 952, 1029, 1086, 1088, 1176, 1267, 1344, 1372, 1428, 1448, 1568, 1632, 1666, 1904, 2058, 2172, 2176, 2352, 2499, 2534, 2688, 2744, 2856, 2896, 3077, 3136, 3264, 3332, 3801, 3808, 4116, 4344, 4704, 4998, 5068, 5488, 5712, 5792, 5831, 6154, 6272, 6528, 6664, 7602, 7616, 8232, 8688, 8869, 9231, 9408, 9996, 10136, 10976, 11424, 11584, 11662, 12308, 13328, 15204, 15232, 16464, 17376, 17493, 17738, 18462, 18816, 19992, 20272, 21539, 21952, 22848, 23168, 23324, 24616, 26607, 26656, 30408, 32928, 34752, 34986, 35476, 36924, 39984, 40544, 43078, 43904, 45696, 46648, 49232, 53214, 53312, 60816, 62083, 64617, 65856, 69504, 69972, 70952, 73848, 79968, 81088, 86156, 93296, 98464, 106428, 106624, 121632, 124166, 129234, 131712, 139944, 141904, 147696, 150773, 159936, 162176, 172312, 186249, 186592, 196928, 212856, 243264, 248332, 258468, 279888, 283808, 295392, 301546, 319872, 344624, 372498, 373184, 393856, 425712, 452319, 486528, 496664, 516936, 559776, 567616, 590784, 603092, 689248, 744996, 746368, 851424, 904638, 993328, 1033872, 1055411, 1119552, 1135232, 1181568, 1206184, 1378496, 1489992, 1702848, 1809276, 1986656, 2067744, 2110822, 2239104, 2412368, 2756992, 2979984, 3166233, 3405696, 3618552, 3973312, 4135488, 4221644, 4824736, 5959968, 6332466, 7237104, 7946624, 8270976, 8443288, 9649472, 11919936, 12664932, 14474208, 16886576, 19298944, 23839872, 25329864, 28948416, 33773152, 50659728, 57896832, 67546304, 101319456, 135092608, 202638912, 405277824.
If you add them up, you will get the total of 1,336,608,000.