21166965

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{10939}}^1$

素因数の和:10993

約数の個数: 24

約数和(自身を含む): 37546080

約数和(自身を除く): 16379115

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 10939, 32817, 54695, 98451, 164085, 470377, 492255, 1411131, 2351885, 4233393, 7055655, 21166965]

約数ペア:

[(1, 21166965), (3, 7055655), (5, 4233393), (9, 2351885), (15, 1411131), (43, 492255), (45, 470377), (129, 164085), (215, 98451), (387, 54695), (645, 32817), (1935, 10939)]