638009905

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{138247}}^1$

素因数の和:138336

約数の個数: 16

約数和(自身を含む): 836123904

約数和(自身を除く): 198113999

約数列:

[1, 5, 13, 65, 71, 355, 923, 4615, 138247, 691235, 1797211, 8986055, 9815537, 49077685, 127601981, 638009905]

約数ペア:

[(1, 638009905), (5, 127601981), (13, 49077685), (65, 9815537), (71, 8986055), (355, 1797211), (923, 691235), (4615, 138247)]