21491485

素因数分解:

$5^1\times {\mathrm{17}}^2\times {\mathrm{107}}^1\times {\mathrm{139}}^1$

素因数の和:285

約数の個数: 24

約数和(自身を含む): 27851040

約数和(自身を除く): 6359555

約数列:

[1, 5, 17, 85, 107, 139, 289, 535, 695, 1445, 1819, 2363, 9095, 11815, 14873, 30923, 40171, 74365, 154615, 200855, 252841, 1264205, 4298297, 21491485]

約数ペア:

[(1, 21491485), (5, 4298297), (17, 1264205), (85, 252841), (107, 200855), (139, 154615), (289, 74365), (535, 40171), (695, 30923), (1445, 14873), (1819, 11815), (2363, 9095)]