20321991

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{61027}}^1$

素因数の和:61070

約数の個数: 12

約数和(自身を含む): 30147832

約数和(自身を除く): 9825841

約数列:

[1, 3, 9, 37, 111, 333, 61027, 183081, 549243, 2257999, 6773997, 20321991]

約数ペア:

[(1, 20321991), (3, 6773997), (9, 2257999), (37, 549243), (111, 183081), (333, 61027)]