18668853

素因数分解:

$3^3\times 7^2\times {\mathrm{103}}^1\times {\mathrm{137}}^1$

素因数の和:263

約数の個数: 48

約数和(自身を含む): 32722560

約数和(自身を除く): 14053707

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 103, 137, 147, 189, 309, 411, 441, 721, 927, 959, 1233, 1323, 2163, 2781, 2877, 3699, 5047, 6489, 6713, 8631, 14111, 15141, 19467, 20139, 25893, 42333, 45423, 60417, 98777, 126999, 136269, 181251, 296331, 380997, 691439, 888993, 2074317, 2666979, 6222951, 18668853]

約数ペア:

[(1, 18668853), (3, 6222951), (7, 2666979), (9, 2074317), (21, 888993), (27, 691439), (49, 380997), (63, 296331), (103, 181251), (137, 136269), (147, 126999), (189, 98777), (309, 60417), (411, 45423), (441, 42333), (721, 25893), (927, 20139), (959, 19467), (1233, 15141), (1323, 14111), (2163, 8631), (2781, 6713), (2877, 6489), (3699, 5047)]