21720012

素因数分解:

$2^2\times 3^1\times {\mathrm{1810001}}^1$

素因数の和:1810008

約数の個数: 12

約数和(自身を含む): 50680056

約数和(自身を除く): 28960044

約数列:

[1, 2, 3, 4, 6, 12, 1810001, 3620002, 5430003, 7240004, 10860006, 21720012]

約数ペア:

[(1, 21720012), (2, 10860006), (3, 7240004), (4, 5430003), (6, 3620002), (12, 1810001)]