20981733

素因数分解:

$3^1\times {\mathrm{73}}^1\times {\mathrm{149}}^1\times {\mathrm{643}}^1$

素因数の和:868

約数の個数: 16

約数和(自身を含む): 28593600

約数和(自身を除く): 7611867

約数列:

[1, 3, 73, 149, 219, 447, 643, 1929, 10877, 32631, 46939, 95807, 140817, 287421, 6993911, 20981733]

約数ペア:

[(1, 20981733), (3, 6993911), (73, 287421), (149, 140817), (219, 95807), (447, 46939), (643, 32631), (1929, 10877)]