18689391

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{6899}}^1$

素因数の和:6955

約数の個数: 24

約数和(自身を含む): 31574400

約数和(自身を除く): 12885009

約数列:

[1, 3, 7, 9, 21, 43, 63, 129, 301, 387, 903, 2709, 6899, 20697, 48293, 62091, 144879, 296657, 434637, 889971, 2076599, 2669913, 6229797, 18689391]

約数ペア:

[(1, 18689391), (3, 6229797), (7, 2669913), (9, 2076599), (21, 889971), (43, 434637), (63, 296657), (129, 144879), (301, 62091), (387, 48293), (903, 20697), (2709, 6899)]