21253276

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{409}}^1\times {\mathrm{1181}}^1$

素因数の和:1605

約数の個数: 24

約数和(自身を含む): 40708080

約数和(自身を除く): 19454804

約数列:

[1, 2, 4, 11, 22, 44, 409, 818, 1181, 1636, 2362, 4499, 4724, 8998, 12991, 17996, 25982, 51964, 483029, 966058, 1932116, 5313319, 10626638, 21253276]

約数ペア:

[(1, 21253276), (2, 10626638), (4, 5313319), (11, 1932116), (22, 966058), (44, 483029), (409, 51964), (818, 25982), (1181, 17996), (1636, 12991), (2362, 8998), (4499, 4724)]