320420020

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{115259}}^1$

素因数の和:115407

約数の個数: 24

約数和(自身を含む): 677728800

約数和(自身を除く): 357308780

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 115259, 230518, 461036, 576295, 1152590, 2305180, 16021001, 32042002, 64084004, 80105005, 160210010, 320420020]

約数ペア:

[(1, 320420020), (2, 160210010), (4, 80105005), (5, 64084004), (10, 32042002), (20, 16021001), (139, 2305180), (278, 1152590), (556, 576295), (695, 461036), (1390, 230518), (2780, 115259)]