128999521

素因数分解:

$7^1\times {\mathrm{107}}^1\times {\mathrm{157}}^1\times {\mathrm{1097}}^1$

素因数の和:1368

約数の個数: 16

約数和(自身を含む): 149890176

約数和(自身を除く): 20890655

約数列:

[1, 7, 107, 157, 749, 1097, 1099, 7679, 16799, 117379, 117593, 172229, 821653, 1205603, 18428503, 128999521]

約数ペア:

[(1, 128999521), (7, 18428503), (107, 1205603), (157, 821653), (749, 172229), (1097, 117593), (1099, 117379), (7679, 16799)]