21905073

素因数分解:

$3^4\times {\mathrm{37}}^1\times {\mathrm{7309}}^1$

素因数の和:7358

約数の個数: 20

約数和(自身を含む): 33611380

約数和(自身を除く): 11706307

約数列:

[1, 3, 9, 27, 37, 81, 111, 333, 999, 2997, 7309, 21927, 65781, 197343, 270433, 592029, 811299, 2433897, 7301691, 21905073]

約数ペア:

[(1, 21905073), (3, 7301691), (9, 2433897), (27, 811299), (37, 592029), (81, 270433), (111, 197343), (333, 65781), (999, 21927), (2997, 7309)]