18720820

素因数分解:

$2^2\times 5^1\times {\mathrm{733}}^1\times {\mathrm{1277}}^1$

素因数の和:2019

約数の個数: 24

約数和(自身を含む): 39398184

約数和(自身を除く): 20677364

約数列:

[1, 2, 4, 5, 10, 20, 733, 1277, 1466, 2554, 2932, 3665, 5108, 6385, 7330, 12770, 14660, 25540, 936041, 1872082, 3744164, 4680205, 9360410, 18720820]

約数ペア:

[(1, 18720820), (2, 9360410), (4, 4680205), (5, 3744164), (10, 1872082), (20, 936041), (733, 25540), (1277, 14660), (1466, 12770), (2554, 7330), (2932, 6385), (3665, 5108)]