21587229

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{257}}^1$

素因数の和:347

約数の個数: 40

約数和(自身を含む): 34839288

約数和(自身を除く): 13252059

約数列:

[1, 3, 9, 17, 27, 51, 61, 81, 153, 183, 257, 459, 549, 771, 1037, 1377, 1647, 2313, 3111, 4369, 4941, 6939, 9333, 13107, 15677, 20817, 27999, 39321, 47031, 83997, 117963, 141093, 266509, 353889, 423279, 799527, 1269837, 2398581, 7195743, 21587229]

約数ペア:

[(1, 21587229), (3, 7195743), (9, 2398581), (17, 1269837), (27, 799527), (51, 423279), (61, 353889), (81, 266509), (153, 141093), (183, 117963), (257, 83997), (459, 47031), (549, 39321), (771, 27999), (1037, 20817), (1377, 15677), (1647, 13107), (2313, 9333), (3111, 6939), (4369, 4941)]