18941391

素因数分解:

$3^3\times 7^2\times {\mathrm{103}}^1\times {\mathrm{139}}^1$

素因数の和:265

約数の個数: 48

約数和(自身を含む): 33196800

約数和(自身を除く): 14255409

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 103, 139, 147, 189, 309, 417, 441, 721, 927, 973, 1251, 1323, 2163, 2781, 2919, 3753, 5047, 6489, 6811, 8757, 14317, 15141, 19467, 20433, 26271, 42951, 45423, 61299, 100219, 128853, 136269, 183897, 300657, 386559, 701533, 901971, 2104599, 2705913, 6313797, 18941391]

約数ペア:

[(1, 18941391), (3, 6313797), (7, 2705913), (9, 2104599), (21, 901971), (27, 701533), (49, 386559), (63, 300657), (103, 183897), (139, 136269), (147, 128853), (189, 100219), (309, 61299), (417, 45423), (441, 42951), (721, 26271), (927, 20433), (973, 19467), (1251, 15141), (1323, 14317), (2163, 8757), (2781, 6811), (2919, 6489), (3753, 5047)]