4128640

素因数分解:

$2^7\times 5^1\times {\mathrm{6451}}^1$

素因数の和:6470

約数の個数: 32

約数和(自身を含む): 9871560

約数和(自身を除く): 5742920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 6451, 12902, 25804, 32255, 51608, 64510, 103216, 129020, 206432, 258040, 412864, 516080, 825728, 1032160, 2064320, 4128640]

約数ペア:

[(1, 4128640), (2, 2064320), (4, 1032160), (5, 825728), (8, 516080), (10, 412864), (16, 258040), (20, 206432), (32, 129020), (40, 103216), (64, 64510), (80, 51608), (128, 32255), (160, 25804), (320, 12902), (640, 6451)]