821583

素因数分解:

$3^6\times 7^2\times {\mathrm{23}}^1$

素因数の和:55

約数の個数: 42

約数和(自身を含む): 1495224

約数和(自身を除く): 673641

約数列:

[1, 3, 7, 9, 21, 23, 27, 49, 63, 69, 81, 147, 161, 189, 207, 243, 441, 483, 567, 621, 729, 1127, 1323, 1449, 1701, 1863, 3381, 3969, 4347, 5103, 5589, 10143, 11907, 13041, 16767, 30429, 35721, 39123, 91287, 117369, 273861, 821583]

約数ペア:

[(1, 821583), (3, 273861), (7, 117369), (9, 91287), (21, 39123), (23, 35721), (27, 30429), (49, 16767), (63, 13041), (69, 11907), (81, 10143), (147, 5589), (161, 5103), (189, 4347), (207, 3969), (243, 3381), (441, 1863), (483, 1701), (567, 1449), (621, 1323), (729, 1127)]