20572881

素因数分解:

$3^1\times 7^1\times {\mathrm{239}}^1\times {\mathrm{4099}}^1$

素因数の和:4348

約数の個数: 16

約数和(自身を含む): 31488000

約数和(自身を除く): 10915119

約数列:

[1, 3, 7, 21, 239, 717, 1673, 4099, 5019, 12297, 28693, 86079, 979661, 2938983, 6857627, 20572881]

約数ペア:

[(1, 20572881), (3, 6857627), (7, 2938983), (21, 979661), (239, 86079), (717, 28693), (1673, 12297), (4099, 5019)]