21161655

素因数分解:

$3^5\times 5^1\times {\mathrm{17417}}^1$

素因数の和:17437

約数の個数: 24

約数和(自身を含む): 38040912

約数和(自身を除く): 16879257

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215, 17417, 52251, 87085, 156753, 261255, 470259, 783765, 1410777, 2351295, 4232331, 7053885, 21161655]

約数ペア:

[(1, 21161655), (3, 7053885), (5, 4232331), (9, 2351295), (15, 1410777), (27, 783765), (45, 470259), (81, 261255), (135, 156753), (243, 87085), (405, 52251), (1215, 17417)]