21395295

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11057}}^1$

素因数の和:11111

約数の個数: 24

約数和(自身を含む): 37951056

約数和(自身を除く): 16555761

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 11057, 33171, 55285, 99513, 165855, 475451, 497565, 1426353, 2377255, 4279059, 7131765, 21395295]

約数ペア:

[(1, 21395295), (3, 7131765), (5, 4279059), (9, 2377255), (15, 1426353), (43, 497565), (45, 475451), (129, 165855), (215, 99513), (387, 55285), (645, 33171), (1935, 11057)]