21171945

素因数分解:

$3^1\times 5^1\times {\mathrm{281}}^1\times {\mathrm{5023}}^1$

素因数の和:5312

約数の個数: 16

約数和(自身を含む): 34002432

約数和(自身を除く): 12830487

約数列:

[1, 3, 5, 15, 281, 843, 1405, 4215, 5023, 15069, 25115, 75345, 1411463, 4234389, 7057315, 21171945]

約数ペア:

[(1, 21171945), (3, 7057315), (5, 4234389), (15, 1411463), (281, 75345), (843, 25115), (1405, 15069), (4215, 5023)]