21481424

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{31223}}^1$

素因数の和:31274

約数の個数: 20

約数和(自身を含む): 42589536

約数和(自身を除く): 21108112

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 31223, 62446, 124892, 249784, 499568, 1342589, 2685178, 5370356, 10740712, 21481424]

約数ペア:

[(1, 21481424), (2, 10740712), (4, 5370356), (8, 2685178), (16, 1342589), (43, 499568), (86, 249784), (172, 124892), (344, 62446), (688, 31223)]