640339968

素因数分解:

$2^{12}\times 3^1\times {\mathrm{31}}^1\times {\mathrm{41}}^2$

素因数の和:140

約数の個数: 156

約数和(自身を含む): 1806475904

約数和(自身を除く): 1166135936

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 24, 31, 32, 41, 48, 62, 64, 82, 93, 96, 123, 124, 128, 164, 186, 192, 246, 248, 256, 328, 372, 384, 492, 496, 512, 656, 744, 768, 984, 992, 1024, 1271, 1312, 1488, 1536, 1681, 1968, 1984, 2048, 2542, 2624, 2976, 3072, 3362, 3813, 3936, 3968, 4096, 5043, 5084, 5248, 5952, 6144, 6724, 7626, 7872, 7936, 10086, 10168, 10496, 11904, 12288, 13448, 15252, 15744, 15872, 20172, 20336, 20992, 23808, 26896, 30504, 31488, 31744, 40344, 40672, 41984, 47616, 52111, 53792, 61008, 62976, 63488, 80688, 81344, 83968, 95232, 104222, 107584, 122016, 125952, 126976, 156333, 161376, 162688, 167936, 190464, 208444, 215168, 244032, 251904, 312666, 322752, 325376, 380928, 416888, 430336, 488064, 503808, 625332, 645504, 650752, 833776, 860672, 976128, 1250664, 1291008, 1301504, 1667552, 1721344, 1952256, 2501328, 2582016, 2603008, 3335104, 3442688, 3904512, 5002656, 5164032, 5206016, 6670208, 6885376, 7809024, 10005312, 10328064, 13340416, 15618048, 20010624, 20656128, 26680832, 40021248, 53361664, 80042496, 106723328, 160084992, 213446656, 320169984, 640339968]

約数ペア:

[(1, 640339968), (2, 320169984), (3, 213446656), (4, 160084992), (6, 106723328), (8, 80042496), (12, 53361664), (16, 40021248), (24, 26680832), (31, 20656128), (32, 20010624), (41, 15618048), (48, 13340416), (62, 10328064), (64, 10005312), (82, 7809024), (93, 6885376), (96, 6670208), (123, 5206016), (124, 5164032), (128, 5002656), (164, 3904512), (186, 3442688), (192, 3335104), (246, 2603008), (248, 2582016), (256, 2501328), (328, 1952256), (372, 1721344), (384, 1667552), (492, 1301504), (496, 1291008), (512, 1250664), (656, 976128), (744, 860672), (768, 833776), (984, 650752), (992, 645504), (1024, 625332), (1271, 503808), (1312, 488064), (1488, 430336), (1536, 416888), (1681, 380928), (1968, 325376), (1984, 322752), (2048, 312666), (2542, 251904), (2624, 244032), (2976, 215168), (3072, 208444), (3362, 190464), (3813, 167936), (3936, 162688), (3968, 161376), (4096, 156333), (5043, 126976), (5084, 125952), (5248, 122016), (5952, 107584), (6144, 104222), (6724, 95232), (7626, 83968), (7872, 81344), (7936, 80688), (10086, 63488), (10168, 62976), (10496, 61008), (11904, 53792), (12288, 52111), (13448, 47616), (15252, 41984), (15744, 40672), (15872, 40344), (20172, 31744), (20336, 31488), (20992, 30504), (23808, 26896)]