20284900

素因数分解:

$2^2\times 5^2\times {\mathrm{109}}^1\times {\mathrm{1861}}^1$

素因数の和:1984

約数の個数: 36

約数和(自身を含む): 44445940

約数和(自身を除く): 24161040

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 109, 218, 436, 545, 1090, 1861, 2180, 2725, 3722, 5450, 7444, 9305, 10900, 18610, 37220, 46525, 93050, 186100, 202849, 405698, 811396, 1014245, 2028490, 4056980, 5071225, 10142450, 20284900]

約数ペア:

[(1, 20284900), (2, 10142450), (4, 5071225), (5, 4056980), (10, 2028490), (20, 1014245), (25, 811396), (50, 405698), (100, 202849), (109, 186100), (218, 93050), (436, 46525), (545, 37220), (1090, 18610), (1861, 10900), (2180, 9305), (2725, 7444), (3722, 5450)]