129081640

素因数分解:

$2^3\times 5^1\times {\mathrm{3227041}}^1$

素因数の和:3227052

約数の個数: 16

約数和(自身を含む): 290433780

約数和(自身を除く): 161352140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 3227041, 6454082, 12908164, 16135205, 25816328, 32270410, 64540820, 129081640]

約数ペア:

[(1, 129081640), (2, 64540820), (4, 32270410), (5, 25816328), (8, 16135205), (10, 12908164), (20, 6454082), (40, 3227041)]