20816404

素因数分解:

$2^2\times 7^1\times {\mathrm{163}}^1\times {\mathrm{4561}}^1$

素因数の和:4735

約数の個数: 24

約数和(自身を含む): 41897408

約数和(自身を除く): 21081004

約数列:

[1, 2, 4, 7, 14, 28, 163, 326, 652, 1141, 2282, 4561, 4564, 9122, 18244, 31927, 63854, 127708, 743443, 1486886, 2973772, 5204101, 10408202, 20816404]

約数ペア:

[(1, 20816404), (2, 10408202), (4, 5204101), (7, 2973772), (14, 1486886), (28, 743443), (163, 127708), (326, 63854), (652, 31927), (1141, 18244), (2282, 9122), (4561, 4564)]