21328989

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{15031}}^1$

素因数の和:15088

約数の個数: 16

約数和(自身を含む): 31747584

約数和(自身を除く): 10418595

約数列:

[1, 3, 11, 33, 43, 129, 473, 1419, 15031, 45093, 165341, 496023, 646333, 1938999, 7109663, 21328989]

約数ペア:

[(1, 21328989), (3, 7109663), (11, 1938999), (33, 646333), (43, 496023), (129, 165341), (473, 45093), (1419, 15031)]