21087945

素因数分解:

$3^4\times 5^1\times {\mathrm{52069}}^1$

素因数の和:52086

約数の個数: 20

約数和(自身を含む): 37802820

約数和(自身を除く): 16714875

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 52069, 156207, 260345, 468621, 781035, 1405863, 2343105, 4217589, 7029315, 21087945]

約数ペア:

[(1, 21087945), (3, 7029315), (5, 4217589), (9, 2343105), (15, 1405863), (27, 781035), (45, 468621), (81, 260345), (135, 156207), (405, 52069)]