21045987

素因数分解:

$3^5\times {\mathrm{257}}^1\times {\mathrm{337}}^1$

素因数の和:609

約数の個数: 24

約数和(自身を含む): 31742256

約数和(自身を除く): 10696269

約数列:

[1, 3, 9, 27, 81, 243, 257, 337, 771, 1011, 2313, 3033, 6939, 9099, 20817, 27297, 62451, 81891, 86609, 259827, 779481, 2338443, 7015329, 21045987]

約数ペア:

[(1, 21045987), (3, 7015329), (9, 2338443), (27, 779481), (81, 259827), (243, 86609), (257, 81891), (337, 62451), (771, 27297), (1011, 20817), (2313, 9099), (3033, 6939)]