21916671

素因数分解:

$3^1\times 7^3\times {\mathrm{19}}^2\times {\mathrm{59}}^1$

素因数の和:121

約数の個数: 48

約数和(自身を含む): 36576000

約数和(自身を除く): 14659329

約数列:

[1, 3, 7, 19, 21, 49, 57, 59, 133, 147, 177, 343, 361, 399, 413, 931, 1029, 1083, 1121, 1239, 2527, 2793, 2891, 3363, 6517, 7581, 7847, 8673, 17689, 19551, 20237, 21299, 23541, 53067, 54929, 60711, 63897, 123823, 149093, 164787, 371469, 384503, 447279, 1043651, 1153509, 3130953, 7305557, 21916671]

約数ペア:

[(1, 21916671), (3, 7305557), (7, 3130953), (19, 1153509), (21, 1043651), (49, 447279), (57, 384503), (59, 371469), (133, 164787), (147, 149093), (177, 123823), (343, 63897), (361, 60711), (399, 54929), (413, 53067), (931, 23541), (1029, 21299), (1083, 20237), (1121, 19551), (1239, 17689), (2527, 8673), (2793, 7847), (2891, 7581), (3363, 6517)]