21653740

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{26407}}^1$

素因数の和:26457

約数の個数: 24

約数和(自身を含む): 46583712

約数和(自身を除く): 24929972

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 26407, 52814, 105628, 132035, 264070, 528140, 1082687, 2165374, 4330748, 5413435, 10826870, 21653740]

約数ペア:

[(1, 21653740), (2, 10826870), (4, 5413435), (5, 4330748), (10, 2165374), (20, 1082687), (41, 528140), (82, 264070), (164, 132035), (205, 105628), (410, 52814), (820, 26407)]