640521728

素因数分解:

$2^9\times 7^2\times {\mathrm{11}}^2\times {\mathrm{211}}^1$

素因数の和:265

約数の個数: 180

約数和(自身を含む): 1644136956

約数和(自身を除く): 1003615228

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 32, 44, 49, 56, 64, 77, 88, 98, 112, 121, 128, 154, 176, 196, 211, 224, 242, 256, 308, 352, 392, 422, 448, 484, 512, 539, 616, 704, 784, 844, 847, 896, 968, 1078, 1232, 1408, 1477, 1568, 1688, 1694, 1792, 1936, 2156, 2321, 2464, 2816, 2954, 3136, 3376, 3388, 3584, 3872, 4312, 4642, 4928, 5632, 5908, 5929, 6272, 6752, 6776, 7744, 8624, 9284, 9856, 10339, 11816, 11858, 12544, 13504, 13552, 15488, 16247, 17248, 18568, 19712, 20678, 23632, 23716, 25088, 25531, 27008, 27104, 30976, 32494, 34496, 37136, 39424, 41356, 47264, 47432, 51062, 54016, 54208, 61952, 64988, 68992, 74272, 82712, 94528, 94864, 102124, 108032, 108416, 113729, 129976, 137984, 148544, 165424, 178717, 189056, 189728, 204248, 216832, 227458, 259952, 275968, 297088, 330848, 357434, 378112, 379456, 408496, 433664, 454916, 519904, 594176, 661696, 714868, 756224, 758912, 816992, 909832, 1039808, 1188352, 1251019, 1323392, 1429736, 1517824, 1633984, 1819664, 2079616, 2502038, 2646784, 2859472, 3035648, 3267968, 3639328, 4159232, 5004076, 5293568, 5718944, 6535936, 7278656, 8318464, 10008152, 11437888, 13071872, 14557312, 20016304, 22875776, 29114624, 40032608, 45751552, 58229248, 80065216, 91503104, 160130432, 320260864, 640521728]

約数ペア:

[(1, 640521728), (2, 320260864), (4, 160130432), (7, 91503104), (8, 80065216), (11, 58229248), (14, 45751552), (16, 40032608), (22, 29114624), (28, 22875776), (32, 20016304), (44, 14557312), (49, 13071872), (56, 11437888), (64, 10008152), (77, 8318464), (88, 7278656), (98, 6535936), (112, 5718944), (121, 5293568), (128, 5004076), (154, 4159232), (176, 3639328), (196, 3267968), (211, 3035648), (224, 2859472), (242, 2646784), (256, 2502038), (308, 2079616), (352, 1819664), (392, 1633984), (422, 1517824), (448, 1429736), (484, 1323392), (512, 1251019), (539, 1188352), (616, 1039808), (704, 909832), (784, 816992), (844, 758912), (847, 756224), (896, 714868), (968, 661696), (1078, 594176), (1232, 519904), (1408, 454916), (1477, 433664), (1568, 408496), (1688, 379456), (1694, 378112), (1792, 357434), (1936, 330848), (2156, 297088), (2321, 275968), (2464, 259952), (2816, 227458), (2954, 216832), (3136, 204248), (3376, 189728), (3388, 189056), (3584, 178717), (3872, 165424), (4312, 148544), (4642, 137984), (4928, 129976), (5632, 113729), (5908, 108416), (5929, 108032), (6272, 102124), (6752, 94864), (6776, 94528), (7744, 82712), (8624, 74272), (9284, 68992), (9856, 64988), (10339, 61952), (11816, 54208), (11858, 54016), (12544, 51062), (13504, 47432), (13552, 47264), (15488, 41356), (16247, 39424), (17248, 37136), (18568, 34496), (19712, 32494), (20678, 30976), (23632, 27104), (23716, 27008), (25088, 25531)]