20872225

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{1069}}^1$

素因数の和:1161

約数の個数: 24

約数和(自身を含む): 28658880

約数和(自身を除く): 7786655

約数列:

[1, 5, 11, 25, 55, 71, 275, 355, 781, 1069, 1775, 3905, 5345, 11759, 19525, 26725, 58795, 75899, 293975, 379495, 834889, 1897475, 4174445, 20872225]

約数ペア:

[(1, 20872225), (5, 4174445), (11, 1897475), (25, 834889), (55, 379495), (71, 293975), (275, 75899), (355, 58795), (781, 26725), (1069, 19525), (1775, 11759), (3905, 5345)]