20997856

素因数分解:

$2^5\times {\mathrm{11}}^3\times {\mathrm{17}}^1\times {\mathrm{29}}^1$

素因数の和:89

約数の個数: 96

約数和(自身を含む): 49805280

約数和(自身を除く): 28807424

約数列:

[1, 2, 4, 8, 11, 16, 17, 22, 29, 32, 34, 44, 58, 68, 88, 116, 121, 136, 176, 187, 232, 242, 272, 319, 352, 374, 464, 484, 493, 544, 638, 748, 928, 968, 986, 1276, 1331, 1496, 1936, 1972, 2057, 2552, 2662, 2992, 3509, 3872, 3944, 4114, 5104, 5324, 5423, 5984, 7018, 7888, 8228, 10208, 10648, 10846, 14036, 15776, 16456, 21296, 21692, 22627, 28072, 32912, 38599, 42592, 43384, 45254, 56144, 59653, 65824, 77198, 86768, 90508, 112288, 119306, 154396, 173536, 181016, 238612, 308792, 362032, 477224, 617584, 656183, 724064, 954448, 1235168, 1312366, 1908896, 2624732, 5249464, 10498928, 20997856]

約数ペア:

[(1, 20997856), (2, 10498928), (4, 5249464), (8, 2624732), (11, 1908896), (16, 1312366), (17, 1235168), (22, 954448), (29, 724064), (32, 656183), (34, 617584), (44, 477224), (58, 362032), (68, 308792), (88, 238612), (116, 181016), (121, 173536), (136, 154396), (176, 119306), (187, 112288), (232, 90508), (242, 86768), (272, 77198), (319, 65824), (352, 59653), (374, 56144), (464, 45254), (484, 43384), (493, 42592), (544, 38599), (638, 32912), (748, 28072), (928, 22627), (968, 21692), (986, 21296), (1276, 16456), (1331, 15776), (1496, 14036), (1936, 10846), (1972, 10648), (2057, 10208), (2552, 8228), (2662, 7888), (2992, 7018), (3509, 5984), (3872, 5423), (3944, 5324), (4114, 5104)]