21564081

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^2\times {\mathrm{37}}^1$

素因数の和:119

約数の個数: 72

約数和(自身を含む): 41306304

約数和(自身を除く): 19742223

約数列:

[1, 3, 7, 9, 11, 21, 29, 33, 37, 63, 77, 87, 99, 111, 203, 231, 259, 261, 319, 333, 407, 609, 693, 777, 841, 957, 1073, 1221, 1827, 2233, 2331, 2523, 2849, 2871, 3219, 3663, 5887, 6699, 7511, 7569, 8547, 9251, 9657, 11803, 17661, 20097, 22533, 25641, 27753, 31117, 35409, 52983, 64757, 67599, 82621, 83259, 93351, 106227, 194271, 217819, 247863, 280053, 342287, 582813, 653457, 743589, 1026861, 1960371, 2396009, 3080583, 7188027, 21564081]

約数ペア:

[(1, 21564081), (3, 7188027), (7, 3080583), (9, 2396009), (11, 1960371), (21, 1026861), (29, 743589), (33, 653457), (37, 582813), (63, 342287), (77, 280053), (87, 247863), (99, 217819), (111, 194271), (203, 106227), (231, 93351), (259, 83259), (261, 82621), (319, 67599), (333, 64757), (407, 52983), (609, 35409), (693, 31117), (777, 27753), (841, 25641), (957, 22533), (1073, 20097), (1221, 17661), (1827, 11803), (2233, 9657), (2331, 9251), (2523, 8547), (2849, 7569), (2871, 7511), (3219, 6699), (3663, 5887)]