20685091

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{173}}^1$

素因数の和:259

約数の個数: 32

約数和(自身を含む): 26726400

約数和(自身を除く): 6041309

約数列:

[1, 7, 19, 29, 31, 133, 173, 203, 217, 551, 589, 899, 1211, 3287, 3857, 4123, 5017, 5363, 6293, 17081, 23009, 35119, 37541, 95323, 101897, 119567, 155527, 667261, 713279, 1088689, 2955013, 20685091]

約数ペア:

[(1, 20685091), (7, 2955013), (19, 1088689), (29, 713279), (31, 667261), (133, 155527), (173, 119567), (203, 101897), (217, 95323), (551, 37541), (589, 35119), (899, 23009), (1211, 17081), (3287, 6293), (3857, 5363), (4123, 5017)]