20805580

素因数分解:

$2^2\times 5^1\times {\mathrm{1009}}^1\times {\mathrm{1031}}^1$

素因数の和:2049

約数の個数: 24

約数和(自身を含む): 43777440

約数和(自身を除く): 22971860

約数列:

[1, 2, 4, 5, 10, 20, 1009, 1031, 2018, 2062, 4036, 4124, 5045, 5155, 10090, 10310, 20180, 20620, 1040279, 2080558, 4161116, 5201395, 10402790, 20805580]

約数ペア:

[(1, 20805580), (2, 10402790), (4, 5201395), (5, 4161116), (10, 2080558), (20, 1040279), (1009, 20620), (1031, 20180), (2018, 10310), (2062, 10090), (4036, 5155), (4124, 5045)]