20179719

素因数分解:

$3^3\times 7^3\times {\mathrm{2179}}^1$

素因数の和:2209

約数の個数: 32

約数和(自身を含む): 34880000

約数和(自身を除く): 14700281

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 147, 189, 343, 441, 1029, 1323, 2179, 3087, 6537, 9261, 15253, 19611, 45759, 58833, 106771, 137277, 320313, 411831, 747397, 960939, 2242191, 2882817, 6726573, 20179719]

約数ペア:

[(1, 20179719), (3, 6726573), (7, 2882817), (9, 2242191), (21, 960939), (27, 747397), (49, 411831), (63, 320313), (147, 137277), (189, 106771), (343, 58833), (441, 45759), (1029, 19611), (1323, 15253), (2179, 9261), (3087, 6537)]