21371259

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{78283}}^1$

素因数の和:78306

約数の個数: 16

約数和(自身を含む): 35071232

約数和(自身を除く): 13699973

約数列:

[1, 3, 7, 13, 21, 39, 91, 273, 78283, 234849, 547981, 1017679, 1643943, 3053037, 7123753, 21371259]

約数ペア:

[(1, 21371259), (3, 7123753), (7, 3053037), (13, 1643943), (21, 1017679), (39, 547981), (91, 234849), (273, 78283)]