19688660

素因数分解:

$2^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{1531}}^1$

素因数の和:2183

約数の個数: 24

約数和(自身を含む): 41437536

約数和(自身を除く): 21748876

約数列:

[1, 2, 4, 5, 10, 20, 643, 1286, 1531, 2572, 3062, 3215, 6124, 6430, 7655, 12860, 15310, 30620, 984433, 1968866, 3937732, 4922165, 9844330, 19688660]

約数ペア:

[(1, 19688660), (2, 9844330), (4, 4922165), (5, 3937732), (10, 1968866), (20, 984433), (643, 30620), (1286, 15310), (1531, 12860), (2572, 7655), (3062, 6430), (3215, 6124)]