21531969

素因数分解:

$3^2\times {\mathrm{47}}^1\times {\mathrm{109}}^1\times {\mathrm{467}}^1$

素因数の和:629

約数の個数: 24

約数和(自身を含む): 32123520

約数和(自身を除く): 10591551

約数列:

[1, 3, 9, 47, 109, 141, 327, 423, 467, 981, 1401, 4203, 5123, 15369, 21949, 46107, 50903, 65847, 152709, 197541, 458127, 2392441, 7177323, 21531969]

約数ペア:

[(1, 21531969), (3, 7177323), (9, 2392441), (47, 458127), (109, 197541), (141, 152709), (327, 65847), (423, 50903), (467, 46107), (981, 21949), (1401, 15369), (4203, 5123)]