20679939

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19309}}^1$

素因数の和:19339

約数の個数: 24

約数和(自身を含む): 36148320

約数和(自身を除く): 15468381

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 19309, 57927, 135163, 173781, 328253, 405489, 984759, 1216467, 2297771, 2954277, 6893313, 20679939]

約数ペア:

[(1, 20679939), (3, 6893313), (7, 2954277), (9, 2297771), (17, 1216467), (21, 984759), (51, 405489), (63, 328253), (119, 173781), (153, 135163), (357, 57927), (1071, 19309)]