128409905

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{63727}}^1$

素因数の和:63776

約数の個数: 16

約数和(自身を含む): 171300864

約数和(自身を除く): 42890959

約数列:

[1, 5, 13, 31, 65, 155, 403, 2015, 63727, 318635, 828451, 1975537, 4142255, 9877685, 25681981, 128409905]

約数ペア:

[(1, 128409905), (5, 25681981), (13, 9877685), (31, 4142255), (65, 1975537), (155, 828451), (403, 318635), (2015, 63727)]