20321456

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{29537}}^1$

素因数の和:29588

約数の個数: 20

約数和(自身を含む): 40289832

約数和(自身を除く): 19968376

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 29537, 59074, 118148, 236296, 472592, 1270091, 2540182, 5080364, 10160728, 20321456]

約数ペア:

[(1, 20321456), (2, 10160728), (4, 5080364), (8, 2540182), (16, 1270091), (43, 472592), (86, 236296), (172, 118148), (344, 59074), (688, 29537)]