20209508

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{409}}^1\times {\mathrm{1123}}^1$

素因数の和:1547

約数の個数: 24

約数和(自身を含む): 38710560

約数和(自身を除く): 18501052

約数列:

[1, 2, 4, 11, 22, 44, 409, 818, 1123, 1636, 2246, 4492, 4499, 8998, 12353, 17996, 24706, 49412, 459307, 918614, 1837228, 5052377, 10104754, 20209508]

約数ペア:

[(1, 20209508), (2, 10104754), (4, 5052377), (11, 1837228), (22, 918614), (44, 459307), (409, 49412), (818, 24706), (1123, 17996), (1636, 12353), (2246, 8998), (4492, 4499)]