21221091

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{63727}}^1$

素因数の和:63770

約数の個数: 12

約数和(自身を含む): 31481632

約数和(自身を除く): 10260541

約数列:

[1, 3, 9, 37, 111, 333, 63727, 191181, 573543, 2357899, 7073697, 21221091]

約数ペア:

[(1, 21221091), (3, 7073697), (9, 2357899), (37, 573543), (111, 191181), (333, 63727)]