128836040

素因数分解:

$2^3\times 5^1\times {\mathrm{3220901}}^1$

素因数の和:3220912

約数の個数: 16

約数和(自身を含む): 289881180

約数和(自身を除く): 161045140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 3220901, 6441802, 12883604, 16104505, 25767208, 32209010, 64418020, 128836040]

約数ペア:

[(1, 128836040), (2, 64418020), (4, 32209010), (5, 25767208), (8, 16104505), (10, 12883604), (20, 6441802), (40, 3220901)]