20577020

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9439}}^1$

素因数の和:9557

約数の個数: 24

約数和(自身を含む): 43612800

約数和(自身を除く): 23035780

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9439, 18878, 37756, 47195, 94390, 188780, 1028851, 2057702, 4115404, 5144255, 10288510, 20577020]

約数ペア:

[(1, 20577020), (2, 10288510), (4, 5144255), (5, 4115404), (10, 2057702), (20, 1028851), (109, 188780), (218, 94390), (436, 47195), (545, 37756), (1090, 18878), (2180, 9439)]