20785400

素因数分解:

$2^3\times 5^2\times {\mathrm{103}}^1\times {\mathrm{1009}}^1$

素因数の和:1128

約数の個数: 48

約数和(自身を含む): 48843600

約数和(自身を除く): 28058200

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 103, 200, 206, 412, 515, 824, 1009, 1030, 2018, 2060, 2575, 4036, 4120, 5045, 5150, 8072, 10090, 10300, 20180, 20600, 25225, 40360, 50450, 100900, 103927, 201800, 207854, 415708, 519635, 831416, 1039270, 2078540, 2598175, 4157080, 5196350, 10392700, 20785400]

約数ペア:

[(1, 20785400), (2, 10392700), (4, 5196350), (5, 4157080), (8, 2598175), (10, 2078540), (20, 1039270), (25, 831416), (40, 519635), (50, 415708), (100, 207854), (103, 201800), (200, 103927), (206, 100900), (412, 50450), (515, 40360), (824, 25225), (1009, 20600), (1030, 20180), (2018, 10300), (2060, 10090), (2575, 8072), (4036, 5150), (4120, 5045)]