20485460

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9397}}^1$

素因数の和:9515

約数の個数: 24

約数和(自身を含む): 43418760

約数和(自身を除く): 22933300

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9397, 18794, 37588, 46985, 93970, 187940, 1024273, 2048546, 4097092, 5121365, 10242730, 20485460]

約数ペア:

[(1, 20485460), (2, 10242730), (4, 5121365), (5, 4097092), (10, 2048546), (20, 1024273), (109, 187940), (218, 93970), (436, 46985), (545, 37588), (1090, 18794), (2180, 9397)]