64396660

素因数分解:

$2^2\times 5^1\times {\mathrm{1627}}^1\times {\mathrm{1979}}^1$

素因数の和:3615

約数の個数: 24

約数和(自身を含む): 135384480

約数和(自身を除く): 70987820

約数列:

[1, 2, 4, 5, 10, 20, 1627, 1979, 3254, 3958, 6508, 7916, 8135, 9895, 16270, 19790, 32540, 39580, 3219833, 6439666, 12879332, 16099165, 32198330, 64396660]

約数ペア:

[(1, 64396660), (2, 32198330), (4, 16099165), (5, 12879332), (10, 6439666), (20, 3219833), (1627, 39580), (1979, 32540), (3254, 19790), (3958, 16270), (6508, 9895), (7916, 8135)]