20641780

素因数分解:

$2^2\times 5^1\times {\mathrm{439}}^1\times {\mathrm{2351}}^1$

素因数の和:2799

約数の個数: 24

約数和(自身を含む): 43464960

約数和(自身を除く): 22823180

約数列:

[1, 2, 4, 5, 10, 20, 439, 878, 1756, 2195, 2351, 4390, 4702, 8780, 9404, 11755, 23510, 47020, 1032089, 2064178, 4128356, 5160445, 10320890, 20641780]

約数ペア:

[(1, 20641780), (2, 10320890), (4, 5160445), (5, 4128356), (10, 2064178), (20, 1032089), (439, 47020), (878, 23510), (1756, 11755), (2195, 9404), (2351, 8780), (4390, 4702)]