21000751208

素因数分解:

$2^3\times {\mathrm{1993}}^1\times {\mathrm{1317157}}^1$

素因数の和:1319156

約数の個数: 16

約数和(自身を含む): 39396195780

約数和(自身を除く): 18395444572

約数列:

[1, 2, 4, 8, 1993, 3986, 7972, 15944, 1317157, 2634314, 5268628, 10537256, 2625093901, 5250187802, 10500375604, 21000751208]

約数ペア:

[(1, 21000751208), (2, 10500375604), (4, 5250187802), (8, 2625093901), (1993, 10537256), (3986, 5268628), (7972, 2634314), (15944, 1317157)]