20377640

素因数分解:

$2^3\times 5^1\times {\mathrm{509441}}^1$

素因数の和:509452

約数の個数: 16

約数和(自身を含む): 45849780

約数和(自身を除く): 25472140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 509441, 1018882, 2037764, 2547205, 4075528, 5094410, 10188820, 20377640]

約数ペア:

[(1, 20377640), (2, 10188820), (4, 5094410), (5, 4075528), (8, 2547205), (10, 2037764), (20, 1018882), (40, 509441)]