21257795

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{8839}}^1$

素因数の和:8894

約数の個数: 16

約数和(自身を含む): 28217280

約数和(自身を除く): 6959485

約数列:

[1, 5, 13, 37, 65, 185, 481, 2405, 8839, 44195, 114907, 327043, 574535, 1635215, 4251559, 21257795]

約数ペア:

[(1, 21257795), (5, 4251559), (13, 1635215), (37, 574535), (65, 327043), (185, 114907), (481, 44195), (2405, 8839)]