20791521

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{2153}}^1$

素因数の和:2225

約数の個数: 24

約数和(自身を含む): 31922280

約数和(自身を除く): 11130759

約数列:

[1, 3, 9, 29, 37, 87, 111, 261, 333, 1073, 2153, 3219, 6459, 9657, 19377, 62437, 79661, 187311, 238983, 561933, 716949, 2310169, 6930507, 20791521]

約数ペア:

[(1, 20791521), (3, 6930507), (9, 2310169), (29, 716949), (37, 561933), (87, 238983), (111, 187311), (261, 79661), (333, 62437), (1073, 19377), (2153, 9657), (3219, 6459)]