21987394

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{241}}^1$

素因数の和:307

約数の個数: 48

約数和(自身を含む): 40554360

約数和(自身を除く): 18566966

約数列:

[1, 2, 11, 13, 22, 26, 29, 58, 121, 143, 241, 242, 286, 319, 377, 482, 638, 754, 1573, 2651, 3133, 3146, 3509, 4147, 5302, 6266, 6989, 7018, 8294, 13978, 29161, 34463, 45617, 58322, 68926, 76879, 90857, 91234, 153758, 181714, 379093, 758186, 845669, 999427, 1691338, 1998854, 10993697, 21987394]

約数ペア:

[(1, 21987394), (2, 10993697), (11, 1998854), (13, 1691338), (22, 999427), (26, 845669), (29, 758186), (58, 379093), (121, 181714), (143, 153758), (241, 91234), (242, 90857), (286, 76879), (319, 68926), (377, 58322), (482, 45617), (638, 34463), (754, 29161), (1573, 13978), (2651, 8294), (3133, 7018), (3146, 6989), (3509, 6266), (4147, 5302)]