18871281

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1$

素因数の和:115

約数の個数: 72

約数和(自身を含む): 34082048

約数和(自身を除く): 15210767

約数列:

[1, 3, 9, 11, 13, 31, 33, 39, 43, 93, 99, 117, 121, 129, 143, 279, 341, 363, 387, 403, 429, 473, 559, 1023, 1089, 1209, 1287, 1333, 1419, 1573, 1677, 3069, 3627, 3751, 3999, 4257, 4433, 4719, 5031, 5203, 6149, 11253, 11997, 13299, 14157, 14663, 15609, 17329, 18447, 33759, 39897, 43989, 46827, 48763, 51987, 55341, 67639, 131967, 146289, 155961, 161293, 190619, 202917, 438867, 483879, 571857, 608751, 1451637, 1715571, 2096809, 6290427, 18871281]

約数ペア:

[(1, 18871281), (3, 6290427), (9, 2096809), (11, 1715571), (13, 1451637), (31, 608751), (33, 571857), (39, 483879), (43, 438867), (93, 202917), (99, 190619), (117, 161293), (121, 155961), (129, 146289), (143, 131967), (279, 67639), (341, 55341), (363, 51987), (387, 48763), (403, 46827), (429, 43989), (473, 39897), (559, 33759), (1023, 18447), (1089, 17329), (1209, 15609), (1287, 14663), (1333, 14157), (1419, 13299), (1573, 11997), (1677, 11253), (3069, 6149), (3627, 5203), (3751, 5031), (3999, 4719), (4257, 4433)]