28001687

素因数分解:

$7^2\times {\mathrm{19}}^2\times {\mathrm{1583}}^1$

素因数の和:1635

約数の個数: 18

約数和(自身を含む): 34399728

約数和(自身を除く): 6398041

約数列:

[1, 7, 19, 49, 133, 361, 931, 1583, 2527, 11081, 17689, 30077, 77567, 210539, 571463, 1473773, 4000241, 28001687]

約数ペア:

[(1, 28001687), (7, 4000241), (19, 1473773), (49, 571463), (133, 210539), (361, 77567), (931, 30077), (1583, 17689), (2527, 11081)]