21189800

素因数分解:

$2^3\times 5^2\times {\mathrm{101}}^1\times {\mathrm{1049}}^1$

素因数の和:1166

約数の個数: 48

約数和(自身を含む): 49801500

約数和(自身を除く): 28611700

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 101, 200, 202, 404, 505, 808, 1010, 1049, 2020, 2098, 2525, 4040, 4196, 5050, 5245, 8392, 10100, 10490, 20200, 20980, 26225, 41960, 52450, 104900, 105949, 209800, 211898, 423796, 529745, 847592, 1059490, 2118980, 2648725, 4237960, 5297450, 10594900, 21189800]

約数ペア:

[(1, 21189800), (2, 10594900), (4, 5297450), (5, 4237960), (8, 2648725), (10, 2118980), (20, 1059490), (25, 847592), (40, 529745), (50, 423796), (100, 211898), (101, 209800), (200, 105949), (202, 104900), (404, 52450), (505, 41960), (808, 26225), (1010, 20980), (1049, 20200), (2020, 10490), (2098, 10100), (2525, 8392), (4040, 5245), (4196, 5050)]