21278808

素因数分解:

$2^3\times 3^3\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1$

素因数の和:166

約数の個数: 128

約数和(自身を含む): 63360000

約数和(自身を除く): 42081192

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 29, 36, 43, 54, 58, 72, 79, 86, 87, 108, 116, 129, 158, 172, 174, 216, 232, 237, 258, 261, 316, 344, 348, 387, 474, 516, 522, 632, 696, 711, 774, 783, 948, 1032, 1044, 1161, 1247, 1422, 1548, 1566, 1896, 2088, 2133, 2291, 2322, 2494, 2844, 3096, 3132, 3397, 3741, 4266, 4582, 4644, 4988, 5688, 6264, 6794, 6873, 7482, 8532, 9164, 9288, 9976, 10191, 11223, 13588, 13746, 14964, 17064, 18328, 20382, 20619, 22446, 27176, 27492, 29928, 30573, 33669, 40764, 41238, 44892, 54984, 61146, 61857, 67338, 81528, 82476, 89784, 91719, 98513, 122292, 123714, 134676, 164952, 183438, 197026, 244584, 247428, 269352, 295539, 366876, 394052, 494856, 591078, 733752, 788104, 886617, 1182156, 1773234, 2364312, 2659851, 3546468, 5319702, 7092936, 10639404, 21278808]

約数ペア:

[(1, 21278808), (2, 10639404), (3, 7092936), (4, 5319702), (6, 3546468), (8, 2659851), (9, 2364312), (12, 1773234), (18, 1182156), (24, 886617), (27, 788104), (29, 733752), (36, 591078), (43, 494856), (54, 394052), (58, 366876), (72, 295539), (79, 269352), (86, 247428), (87, 244584), (108, 197026), (116, 183438), (129, 164952), (158, 134676), (172, 123714), (174, 122292), (216, 98513), (232, 91719), (237, 89784), (258, 82476), (261, 81528), (316, 67338), (344, 61857), (348, 61146), (387, 54984), (474, 44892), (516, 41238), (522, 40764), (632, 33669), (696, 30573), (711, 29928), (774, 27492), (783, 27176), (948, 22446), (1032, 20619), (1044, 20382), (1161, 18328), (1247, 17064), (1422, 14964), (1548, 13746), (1566, 13588), (1896, 11223), (2088, 10191), (2133, 9976), (2291, 9288), (2322, 9164), (2494, 8532), (2844, 7482), (3096, 6873), (3132, 6794), (3397, 6264), (3741, 5688), (4266, 4988), (4582, 4644)]