128642780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{918877}}^1$

素因数の和:918893

約数の個数: 24

約数和(自身を含む): 308743008

約数和(自身を除く): 180100228

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 918877, 1837754, 3675508, 4594385, 6432139, 9188770, 12864278, 18377540, 25728556, 32160695, 64321390, 128642780]

約数ペア:

[(1, 128642780), (2, 64321390), (4, 32160695), (5, 25728556), (7, 18377540), (10, 12864278), (14, 9188770), (20, 6432139), (28, 4594385), (35, 3675508), (70, 1837754), (140, 918877)]