21489525

素因数分解:

$3^2\times 5^2\times {\mathrm{149}}^1\times {\mathrm{641}}^1$

素因数の和:806

約数の個数: 36

約数和(自身を含む): 38808900

約数和(自身を除く): 17319375

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 149, 225, 447, 641, 745, 1341, 1923, 2235, 3205, 3725, 5769, 6705, 9615, 11175, 16025, 28845, 33525, 48075, 95509, 144225, 286527, 477545, 859581, 1432635, 2387725, 4297905, 7163175, 21489525]

約数ペア:

[(1, 21489525), (3, 7163175), (5, 4297905), (9, 2387725), (15, 1432635), (25, 859581), (45, 477545), (75, 286527), (149, 144225), (225, 95509), (447, 48075), (641, 33525), (745, 28845), (1341, 16025), (1923, 11175), (2235, 9615), (3205, 6705), (3725, 5769)]