20781531

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{3671}}^1$

素因数の和:3731

約数の個数: 24

約数和(自身を含む): 32651424

約数和(自身を除く): 11869893

約数列:

[1, 3, 9, 17, 37, 51, 111, 153, 333, 629, 1887, 3671, 5661, 11013, 33039, 62407, 135827, 187221, 407481, 561663, 1222443, 2309059, 6927177, 20781531]

約数ペア:

[(1, 20781531), (3, 6927177), (9, 2309059), (17, 1222443), (37, 561663), (51, 407481), (111, 187221), (153, 135827), (333, 62407), (629, 33039), (1887, 11013), (3671, 5661)]