21039885

素因数分解:

$3^3\times 5^1\times {\mathrm{155851}}^1$

素因数の和:155865

約数の個数: 16

約数和(自身を含む): 37404480

約数和(自身を除く): 16364595

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 155851, 467553, 779255, 1402659, 2337765, 4207977, 7013295, 21039885]

約数ペア:

[(1, 21039885), (3, 7013295), (5, 4207977), (9, 2337765), (15, 1402659), (27, 779255), (45, 467553), (135, 155851)]