20561828

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{17911}}^1$

素因数の和:17963

約数の個数: 24

約数和(自身を含む): 42129024

約数和(自身を除く): 21567196

約数列:

[1, 2, 4, 7, 14, 28, 41, 82, 164, 287, 574, 1148, 17911, 35822, 71644, 125377, 250754, 501508, 734351, 1468702, 2937404, 5140457, 10280914, 20561828]

約数ペア:

[(1, 20561828), (2, 10280914), (4, 5140457), (7, 2937404), (14, 1468702), (28, 734351), (41, 501508), (82, 250754), (164, 125377), (287, 71644), (574, 35822), (1148, 17911)]