81348620

素因数分解:

$2^2\times 5^1\times {\mathrm{1559}}^1\times {\mathrm{2609}}^1$

素因数の和:4177

約数の個数: 24

約数和(自身を含む): 171007200

約数和(自身を除く): 89658580

約数列:

[1, 2, 4, 5, 10, 20, 1559, 2609, 3118, 5218, 6236, 7795, 10436, 13045, 15590, 26090, 31180, 52180, 4067431, 8134862, 16269724, 20337155, 40674310, 81348620]

約数ペア:

[(1, 81348620), (2, 40674310), (4, 20337155), (5, 16269724), (10, 8134862), (20, 4067431), (1559, 52180), (2609, 31180), (3118, 26090), (5218, 15590), (6236, 13045), (7795, 10436)]