21416967

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^2$

素因数の和:122

約数の個数: 60

約数和(自身を含む): 38480904

約数和(自身を除く): 17063937

約数列:

[1, 3, 9, 11, 13, 27, 33, 39, 43, 81, 99, 117, 129, 143, 297, 351, 387, 429, 473, 559, 891, 1053, 1161, 1287, 1419, 1677, 1849, 3483, 3861, 4257, 5031, 5547, 6149, 11583, 12771, 15093, 16641, 18447, 20339, 24037, 38313, 45279, 49923, 55341, 61017, 72111, 149769, 166023, 183051, 216333, 264407, 498069, 549153, 648999, 793221, 1647459, 1946997, 2379663, 7138989, 21416967]

約数ペア:

[(1, 21416967), (3, 7138989), (9, 2379663), (11, 1946997), (13, 1647459), (27, 793221), (33, 648999), (39, 549153), (43, 498069), (81, 264407), (99, 216333), (117, 183051), (129, 166023), (143, 149769), (297, 72111), (351, 61017), (387, 55341), (429, 49923), (473, 45279), (559, 38313), (891, 24037), (1053, 20339), (1161, 18447), (1287, 16641), (1419, 15093), (1677, 12771), (1849, 11583), (3483, 6149), (3861, 5547), (4257, 5031)]