20085880

素因数分解:

$2^3\times 5^1\times {\mathrm{281}}^1\times {\mathrm{1787}}^1$

素因数の和:2079

約数の個数: 32

約数和(自身を含む): 45379440

約数和(自身を除く): 25293560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 281, 562, 1124, 1405, 1787, 2248, 2810, 3574, 5620, 7148, 8935, 11240, 14296, 17870, 35740, 71480, 502147, 1004294, 2008588, 2510735, 4017176, 5021470, 10042940, 20085880]

約数ペア:

[(1, 20085880), (2, 10042940), (4, 5021470), (5, 4017176), (8, 2510735), (10, 2008588), (20, 1004294), (40, 502147), (281, 71480), (562, 35740), (1124, 17870), (1405, 14296), (1787, 11240), (2248, 8935), (2810, 7148), (3574, 5620)]