28721275

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{1471}}^1$

素因数の和:1563

約数の個数: 24

約数和(自身を含む): 39426048

約数和(自身を除く): 10704773

約数列:

[1, 5, 11, 25, 55, 71, 275, 355, 781, 1471, 1775, 3905, 7355, 16181, 19525, 36775, 80905, 104441, 404525, 522205, 1148851, 2611025, 5744255, 28721275]

約数ペア:

[(1, 28721275), (5, 5744255), (11, 2611025), (25, 1148851), (55, 522205), (71, 404525), (275, 104441), (355, 80905), (781, 36775), (1471, 19525), (1775, 16181), (3905, 7355)]