21201111

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{63667}}^1$

素因数の和:63710

約数の個数: 12

約数和(自身を含む): 31451992

約数和(自身を除く): 10250881

約数列:

[1, 3, 9, 37, 111, 333, 63667, 191001, 573003, 2355679, 7067037, 21201111]

約数ペア:

[(1, 21201111), (3, 7067037), (9, 2355679), (37, 573003), (111, 191001), (333, 63667)]