18355281

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{20327}}^1$

素因数の和:20380

約数の個数: 16

約数和(自身を含む): 28621824

約数和(自身を除く): 10266543

約数列:

[1, 3, 7, 21, 43, 129, 301, 903, 20327, 60981, 142289, 426867, 874061, 2622183, 6118427, 18355281]

約数ペア:

[(1, 18355281), (3, 6118427), (7, 2622183), (21, 874061), (43, 426867), (129, 142289), (301, 60981), (903, 20327)]