640647168

素因数分解:

$2^{15}\times 3^1\times 7^3\times {\mathrm{19}}^1$

素因数の和:73

約数の個数: 256

約数和(自身を含む): 2097120000

約数和(自身を除く): 1456472832

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 19, 21, 24, 28, 32, 38, 42, 48, 49, 56, 57, 64, 76, 84, 96, 98, 112, 114, 128, 133, 147, 152, 168, 192, 196, 224, 228, 256, 266, 294, 304, 336, 343, 384, 392, 399, 448, 456, 512, 532, 588, 608, 672, 686, 768, 784, 798, 896, 912, 931, 1024, 1029, 1064, 1176, 1216, 1344, 1372, 1536, 1568, 1596, 1792, 1824, 1862, 2048, 2058, 2128, 2352, 2432, 2688, 2744, 2793, 3072, 3136, 3192, 3584, 3648, 3724, 4096, 4116, 4256, 4704, 4864, 5376, 5488, 5586, 6144, 6272, 6384, 6517, 7168, 7296, 7448, 8192, 8232, 8512, 9408, 9728, 10752, 10976, 11172, 12288, 12544, 12768, 13034, 14336, 14592, 14896, 16384, 16464, 17024, 18816, 19456, 19551, 21504, 21952, 22344, 24576, 25088, 25536, 26068, 28672, 29184, 29792, 32768, 32928, 34048, 37632, 38912, 39102, 43008, 43904, 44688, 49152, 50176, 51072, 52136, 57344, 58368, 59584, 65856, 68096, 75264, 77824, 78204, 86016, 87808, 89376, 98304, 100352, 102144, 104272, 114688, 116736, 119168, 131712, 136192, 150528, 155648, 156408, 172032, 175616, 178752, 200704, 204288, 208544, 229376, 233472, 238336, 263424, 272384, 301056, 311296, 312816, 344064, 351232, 357504, 401408, 408576, 417088, 466944, 476672, 526848, 544768, 602112, 622592, 625632, 688128, 702464, 715008, 802816, 817152, 834176, 933888, 953344, 1053696, 1089536, 1204224, 1251264, 1404928, 1430016, 1605632, 1634304, 1668352, 1867776, 1906688, 2107392, 2179072, 2408448, 2502528, 2809856, 2860032, 3268608, 3336704, 3813376, 4214784, 4358144, 4816896, 5005056, 5619712, 5720064, 6537216, 6673408, 7626752, 8429568, 10010112, 11239424, 11440128, 13074432, 13346816, 15253504, 16859136, 20020224, 22880256, 26693632, 30507008, 33718272, 40040448, 45760512, 53387264, 80080896, 91521024, 106774528, 160161792, 213549056, 320323584, 640647168]

約数ペア:

[(1, 640647168), (2, 320323584), (3, 213549056), (4, 160161792), (6, 106774528), (7, 91521024), (8, 80080896), (12, 53387264), (14, 45760512), (16, 40040448), (19, 33718272), (21, 30507008), (24, 26693632), (28, 22880256), (32, 20020224), (38, 16859136), (42, 15253504), (48, 13346816), (49, 13074432), (56, 11440128), (57, 11239424), (64, 10010112), (76, 8429568), (84, 7626752), (96, 6673408), (98, 6537216), (112, 5720064), (114, 5619712), (128, 5005056), (133, 4816896), (147, 4358144), (152, 4214784), (168, 3813376), (192, 3336704), (196, 3268608), (224, 2860032), (228, 2809856), (256, 2502528), (266, 2408448), (294, 2179072), (304, 2107392), (336, 1906688), (343, 1867776), (384, 1668352), (392, 1634304), (399, 1605632), (448, 1430016), (456, 1404928), (512, 1251264), (532, 1204224), (588, 1089536), (608, 1053696), (672, 953344), (686, 933888), (768, 834176), (784, 817152), (798, 802816), (896, 715008), (912, 702464), (931, 688128), (1024, 625632), (1029, 622592), (1064, 602112), (1176, 544768), (1216, 526848), (1344, 476672), (1372, 466944), (1536, 417088), (1568, 408576), (1596, 401408), (1792, 357504), (1824, 351232), (1862, 344064), (2048, 312816), (2058, 311296), (2128, 301056), (2352, 272384), (2432, 263424), (2688, 238336), (2744, 233472), (2793, 229376), (3072, 208544), (3136, 204288), (3192, 200704), (3584, 178752), (3648, 175616), (3724, 172032), (4096, 156408), (4116, 155648), (4256, 150528), (4704, 136192), (4864, 131712), (5376, 119168), (5488, 116736), (5586, 114688), (6144, 104272), (6272, 102144), (6384, 100352), (6517, 98304), (7168, 89376), (7296, 87808), (7448, 86016), (8192, 78204), (8232, 77824), (8512, 75264), (9408, 68096), (9728, 65856), (10752, 59584), (10976, 58368), (11172, 57344), (12288, 52136), (12544, 51072), (12768, 50176), (13034, 49152), (14336, 44688), (14592, 43904), (14896, 43008), (16384, 39102), (16464, 38912), (17024, 37632), (18816, 34048), (19456, 32928), (19551, 32768), (21504, 29792), (21952, 29184), (22344, 28672), (24576, 26068), (25088, 25536)]