20998656

素因数分解:

$2^9\times 3^3\times 7^2\times {\mathrm{31}}^1$

素因数の和:72

約数の個数: 240

約数和(自身を含む): 74638080

約数和(自身を除く): 53639424

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 16, 18, 21, 24, 27, 28, 31, 32, 36, 42, 48, 49, 54, 56, 62, 63, 64, 72, 84, 93, 96, 98, 108, 112, 124, 126, 128, 144, 147, 168, 186, 189, 192, 196, 216, 217, 224, 248, 252, 256, 279, 288, 294, 336, 372, 378, 384, 392, 432, 434, 441, 448, 496, 504, 512, 558, 576, 588, 651, 672, 744, 756, 768, 784, 837, 864, 868, 882, 896, 992, 1008, 1116, 1152, 1176, 1302, 1323, 1344, 1488, 1512, 1519, 1536, 1568, 1674, 1728, 1736, 1764, 1792, 1953, 1984, 2016, 2232, 2304, 2352, 2604, 2646, 2688, 2976, 3024, 3038, 3136, 3348, 3456, 3472, 3528, 3584, 3906, 3968, 4032, 4464, 4557, 4608, 4704, 5208, 5292, 5376, 5859, 5952, 6048, 6076, 6272, 6696, 6912, 6944, 7056, 7812, 7936, 8064, 8928, 9114, 9408, 10416, 10584, 10752, 11718, 11904, 12096, 12152, 12544, 13392, 13671, 13824, 13888, 14112, 15624, 15872, 16128, 17856, 18228, 18816, 20832, 21168, 23436, 23808, 24192, 24304, 25088, 26784, 27342, 27776, 28224, 31248, 32256, 35712, 36456, 37632, 41013, 41664, 42336, 46872, 47616, 48384, 48608, 53568, 54684, 55552, 56448, 62496, 71424, 72912, 75264, 82026, 83328, 84672, 93744, 96768, 97216, 107136, 109368, 111104, 112896, 124992, 142848, 145824, 164052, 166656, 169344, 187488, 194432, 214272, 218736, 225792, 249984, 291648, 328104, 333312, 338688, 374976, 388864, 428544, 437472, 499968, 583296, 656208, 677376, 749952, 777728, 874944, 999936, 1166592, 1312416, 1499904, 1749888, 2333184, 2624832, 2999808, 3499776, 5249664, 6999552, 10499328, 20998656]

約数ペア:

[(1, 20998656), (2, 10499328), (3, 6999552), (4, 5249664), (6, 3499776), (7, 2999808), (8, 2624832), (9, 2333184), (12, 1749888), (14, 1499904), (16, 1312416), (18, 1166592), (21, 999936), (24, 874944), (27, 777728), (28, 749952), (31, 677376), (32, 656208), (36, 583296), (42, 499968), (48, 437472), (49, 428544), (54, 388864), (56, 374976), (62, 338688), (63, 333312), (64, 328104), (72, 291648), (84, 249984), (93, 225792), (96, 218736), (98, 214272), (108, 194432), (112, 187488), (124, 169344), (126, 166656), (128, 164052), (144, 145824), (147, 142848), (168, 124992), (186, 112896), (189, 111104), (192, 109368), (196, 107136), (216, 97216), (217, 96768), (224, 93744), (248, 84672), (252, 83328), (256, 82026), (279, 75264), (288, 72912), (294, 71424), (336, 62496), (372, 56448), (378, 55552), (384, 54684), (392, 53568), (432, 48608), (434, 48384), (441, 47616), (448, 46872), (496, 42336), (504, 41664), (512, 41013), (558, 37632), (576, 36456), (588, 35712), (651, 32256), (672, 31248), (744, 28224), (756, 27776), (768, 27342), (784, 26784), (837, 25088), (864, 24304), (868, 24192), (882, 23808), (896, 23436), (992, 21168), (1008, 20832), (1116, 18816), (1152, 18228), (1176, 17856), (1302, 16128), (1323, 15872), (1344, 15624), (1488, 14112), (1512, 13888), (1519, 13824), (1536, 13671), (1568, 13392), (1674, 12544), (1728, 12152), (1736, 12096), (1764, 11904), (1792, 11718), (1953, 10752), (1984, 10584), (2016, 10416), (2232, 9408), (2304, 9114), (2352, 8928), (2604, 8064), (2646, 7936), (2688, 7812), (2976, 7056), (3024, 6944), (3038, 6912), (3136, 6696), (3348, 6272), (3456, 6076), (3472, 6048), (3528, 5952), (3584, 5859), (3906, 5376), (3968, 5292), (4032, 5208), (4464, 4704), (4557, 4608)]