19912321

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{8191}}^1$

素因数の和:8232

約数の個数: 16

約数和(自身を含む): 24772608

約数和(自身を除く): 4860287

約数列:

[1, 11, 13, 17, 143, 187, 221, 2431, 8191, 90101, 106483, 139247, 1171313, 1531717, 1810211, 19912321]

約数ペア:

[(1, 19912321), (11, 1810211), (13, 1531717), (17, 1171313), (143, 139247), (187, 106483), (221, 90101), (2431, 8191)]