81690889

素因数分解:

$7^2\times {\mathrm{67}}^1\times {\mathrm{149}}^1\times {\mathrm{167}}^1$

素因数の和:397

約数の個数: 24

約数和(自身を含む): 97675200

約数和(自身を除く): 15984311

約数列:

[1, 7, 49, 67, 149, 167, 469, 1043, 1169, 3283, 7301, 8183, 9983, 11189, 24883, 69881, 78323, 174181, 489167, 548261, 1219267, 1667161, 11670127, 81690889]

約数ペア:

[(1, 81690889), (7, 11670127), (49, 1667161), (67, 1219267), (149, 548261), (167, 489167), (469, 174181), (1043, 78323), (1169, 69881), (3283, 24883), (7301, 11189), (8183, 9983)]