20304081

素因数分解:

$3^3\times 7^2\times {\mathrm{103}}^1\times {\mathrm{149}}^1$

素因数の和:275

約数の個数: 48

約数和(自身を含む): 35568000

約数和(自身を除く): 15263919

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 103, 147, 149, 189, 309, 441, 447, 721, 927, 1043, 1323, 1341, 2163, 2781, 3129, 4023, 5047, 6489, 7301, 9387, 15141, 15347, 19467, 21903, 28161, 45423, 46041, 65709, 107429, 136269, 138123, 197127, 322287, 414369, 752003, 966861, 2256009, 2900583, 6768027, 20304081]

約数ペア:

[(1, 20304081), (3, 6768027), (7, 2900583), (9, 2256009), (21, 966861), (27, 752003), (49, 414369), (63, 322287), (103, 197127), (147, 138123), (149, 136269), (189, 107429), (309, 65709), (441, 46041), (447, 45423), (721, 28161), (927, 21903), (1043, 19467), (1323, 15347), (1341, 15141), (2163, 9387), (2781, 7301), (3129, 6489), (4023, 5047)]