20497640

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{10903}}^1$

素因数の和:10961

約数の個数: 32

約数和(自身を含む): 47105280

約数和(自身を除く): 26607640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 188, 235, 376, 470, 940, 1880, 10903, 21806, 43612, 54515, 87224, 109030, 218060, 436120, 512441, 1024882, 2049764, 2562205, 4099528, 5124410, 10248820, 20497640]

約数ペア:

[(1, 20497640), (2, 10248820), (4, 5124410), (5, 4099528), (8, 2562205), (10, 2049764), (20, 1024882), (40, 512441), (47, 436120), (94, 218060), (188, 109030), (235, 87224), (376, 54515), (470, 43612), (940, 21806), (1880, 10903)]