21158181

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{19429}}^1$

素因数の和:19457

約数の個数: 18

約数和(自身を含む): 33594470

約数和(自身を除く): 12436289

約数列:

[1, 3, 9, 11, 33, 99, 121, 363, 1089, 19429, 58287, 174861, 213719, 641157, 1923471, 2350909, 7052727, 21158181]

約数ペア:

[(1, 21158181), (3, 7052727), (9, 2350909), (11, 1923471), (33, 641157), (99, 213719), (121, 174861), (363, 58287), (1089, 19429)]