21200055

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{30071}}^1$

素因数の和:30126

約数の個数: 16

約数和(自身を含む): 34642944

約数和(自身を除く): 13442889

約数列:

[1, 3, 5, 15, 47, 141, 235, 705, 30071, 90213, 150355, 451065, 1413337, 4240011, 7066685, 21200055]

約数ペア:

[(1, 21200055), (3, 7066685), (5, 4240011), (15, 1413337), (47, 451065), (141, 150355), (235, 90213), (705, 30071)]