18991874

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{151}}^1\times {\mathrm{5717}}^1$

素因数の和:5881

約数の個数: 16

約数和(自身を含む): 31288896

約数和(自身を除く): 12297022

約数列:

[1, 2, 11, 22, 151, 302, 1661, 3322, 5717, 11434, 62887, 125774, 863267, 1726534, 9495937, 18991874]

約数ペア:

[(1, 18991874), (2, 9495937), (11, 1726534), (22, 863267), (151, 125774), (302, 62887), (1661, 11434), (3322, 5717)]