21009021

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{29}}^2\times {\mathrm{757}}^1$

素因数の和:829

約数の個数: 24

約数和(自身を含む): 31690464

約数和(自身を除く): 10681443

約数列:

[1, 3, 11, 29, 33, 87, 319, 757, 841, 957, 2271, 2523, 8327, 9251, 21953, 24981, 27753, 65859, 241483, 636637, 724449, 1909911, 7003007, 21009021]

約数ペア:

[(1, 21009021), (3, 7003007), (11, 1909911), (29, 724449), (33, 636637), (87, 241483), (319, 65859), (757, 27753), (841, 24981), (957, 21953), (2271, 9251), (2523, 8327)]