21357189

素因数分解:

$3^4\times 7^2\times {\mathrm{5381}}^1$

素因数の和:5407

約数の個数: 30

約数和(自身を含む): 37119654

約数和(自身を除く): 15762465

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 441, 567, 1323, 3969, 5381, 16143, 37667, 48429, 113001, 145287, 263669, 339003, 435861, 791007, 1017009, 2373021, 3051027, 7119063, 21357189]

約数ペア:

[(1, 21357189), (3, 7119063), (7, 3051027), (9, 2373021), (21, 1017009), (27, 791007), (49, 435861), (63, 339003), (81, 263669), (147, 145287), (189, 113001), (441, 48429), (567, 37667), (1323, 16143), (3969, 5381)]