21395715

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{129671}}^1$

素因数の和:129690

約数の個数: 16

約数和(自身を含む): 37345536

約数和(自身を除く): 15949821

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 129671, 389013, 648355, 1426381, 1945065, 4279143, 7131905, 21395715]

約数ペア:

[(1, 21395715), (3, 7131905), (5, 4279143), (11, 1945065), (15, 1426381), (33, 648355), (55, 389013), (165, 129671)]