21002391

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{263}}^1\times {\mathrm{467}}^1$

素因数の和:755

約数の個数: 24

約数和(自身を含む): 32123520

約数和(自身を除く): 11121129

約数列:

[1, 3, 9, 19, 57, 171, 263, 467, 789, 1401, 2367, 4203, 4997, 8873, 14991, 26619, 44973, 79857, 122821, 368463, 1105389, 2333599, 7000797, 21002391]

約数ペア:

[(1, 21002391), (3, 7000797), (9, 2333599), (19, 1105389), (57, 368463), (171, 122821), (263, 79857), (467, 44973), (789, 26619), (1401, 14991), (2367, 8873), (4203, 4997)]