20991801

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{3851}}^1$

素因数の和:3956

約数の個数: 16

約数和(自身を含む): 29583360

約数和(自身を除く): 8591559

約数列:

[1, 3, 23, 69, 79, 237, 1817, 3851, 5451, 11553, 88573, 265719, 304229, 912687, 6997267, 20991801]

約数ペア:

[(1, 20991801), (3, 6997267), (23, 912687), (69, 304229), (79, 265719), (237, 88573), (1817, 11553), (3851, 5451)]