128371240

素因数分解:

$2^3\times 5^1\times {\mathrm{3209281}}^1$

素因数の和:3209292

約数の個数: 16

約数和(自身を含む): 288835380

約数和(自身を除く): 160464140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 3209281, 6418562, 12837124, 16046405, 25674248, 32092810, 64185620, 128371240]

約数ペア:

[(1, 128371240), (2, 64185620), (4, 32092810), (5, 25674248), (8, 16046405), (10, 12837124), (20, 6418562), (40, 3209281)]