21424743

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{15559}}^1$

素因数の和:15588

約数の個数: 20

約数和(自身を含む): 33889680

約数和(自身を除く): 12464937

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 15559, 46677, 140031, 264503, 420093, 793509, 1260279, 2380527, 7141581, 21424743]

約数ペア:

[(1, 21424743), (3, 7141581), (9, 2380527), (17, 1260279), (27, 793509), (51, 420093), (81, 264503), (153, 140031), (459, 46677), (1377, 15559)]