218229389

素因数分解:

$7^2\times {\mathrm{107}}^2\times {\mathrm{389}}^1$

素因数の和:617

約数の個数: 18

約数和(自身を含む): 256912110

約数和(自身を除く): 38682721

約数列:

[1, 7, 49, 107, 389, 749, 2723, 5243, 11449, 19061, 41623, 80143, 291361, 561001, 2039527, 4453661, 31175627, 218229389]

約数ペア:

[(1, 218229389), (7, 31175627), (49, 4453661), (107, 2039527), (389, 561001), (749, 291361), (2723, 80143), (5243, 41623), (11449, 19061)]