21289389

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{277}}^1$

素因数の和:445

約数の個数: 32

約数和(自身を含む): 33146496

約数和(自身を除く): 11857107

約数列:

[1, 3, 11, 17, 33, 51, 137, 187, 277, 411, 561, 831, 1507, 2329, 3047, 4521, 4709, 6987, 9141, 14127, 25619, 37949, 51799, 76857, 113847, 155397, 417439, 645133, 1252317, 1935399, 7096463, 21289389]

約数ペア:

[(1, 21289389), (3, 7096463), (11, 1935399), (17, 1252317), (33, 645133), (51, 417439), (137, 155397), (187, 113847), (277, 76857), (411, 51799), (561, 37949), (831, 25619), (1507, 14127), (2329, 9141), (3047, 6987), (4521, 4709)]