21080385

素因数分解:

$3^3\times 5^1\times {\mathrm{156151}}^1$

素因数の和:156165

約数の個数: 16

約数和(自身を含む): 37476480

約数和(自身を除く): 16396095

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 156151, 468453, 780755, 1405359, 2342265, 4216077, 7026795, 21080385]

約数ペア:

[(1, 21080385), (3, 7026795), (5, 4216077), (9, 2342265), (15, 1405359), (27, 780755), (45, 468453), (135, 156151)]