20871291

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{181}}^1$

素因数の和:244

約数の個数: 48

約数和(自身を含む): 35759360

約数和(自身を除く): 14888069

約数列:

[1, 3, 7, 17, 19, 21, 51, 57, 119, 133, 181, 289, 323, 357, 399, 543, 867, 969, 1267, 2023, 2261, 3077, 3439, 3801, 5491, 6069, 6783, 9231, 10317, 16473, 21539, 24073, 38437, 52309, 58463, 64617, 72219, 115311, 156927, 175389, 366163, 409241, 993871, 1098489, 1227723, 2981613, 6957097, 20871291]

約数ペア:

[(1, 20871291), (3, 6957097), (7, 2981613), (17, 1227723), (19, 1098489), (21, 993871), (51, 409241), (57, 366163), (119, 175389), (133, 156927), (181, 115311), (289, 72219), (323, 64617), (357, 58463), (399, 52309), (543, 38437), (867, 24073), (969, 21539), (1267, 16473), (2023, 10317), (2261, 9231), (3077, 6783), (3439, 6069), (3801, 5491)]