20011905

素因数分解:

$3^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{1109}}^1$

素因数の和:1521

約数の個数: 24

約数和(自身を含む): 34805160

約数和(自身を除く): 14793255

約数列:

[1, 3, 5, 9, 15, 45, 401, 1109, 1203, 2005, 3327, 3609, 5545, 6015, 9981, 16635, 18045, 49905, 444709, 1334127, 2223545, 4002381, 6670635, 20011905]

約数ペア:

[(1, 20011905), (3, 6670635), (5, 4002381), (9, 2223545), (15, 1334127), (45, 444709), (401, 49905), (1109, 18045), (1203, 16635), (2005, 9981), (3327, 6015), (3609, 5545)]