18286821

素因数分解:

$3^2\times 7^1\times {\mathrm{109}}^1\times {\mathrm{2663}}^1$

素因数の和:2785

約数の個数: 24

約数和(自身を含む): 30476160

約数和(自身を除く): 12189339

約数列:

[1, 3, 7, 9, 21, 63, 109, 327, 763, 981, 2289, 2663, 6867, 7989, 18641, 23967, 55923, 167769, 290267, 870801, 2031869, 2612403, 6095607, 18286821]

約数ペア:

[(1, 18286821), (3, 6095607), (7, 2612403), (9, 2031869), (21, 870801), (63, 290267), (109, 167769), (327, 55923), (763, 23967), (981, 18641), (2289, 7989), (2663, 6867)]