21210579

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{20143}}^1$

素因数の和:20168

約数の個数: 20

約数和(自身を含む): 34123936

約数和(自身を除く): 12913357

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 20143, 60429, 181287, 261859, 543861, 785577, 1631583, 2356731, 7070193, 21210579]

約数ペア:

[(1, 21210579), (3, 7070193), (9, 2356731), (13, 1631583), (27, 785577), (39, 543861), (81, 261859), (117, 181287), (351, 60429), (1053, 20143)]