20620000

素因数分解:

$2^5\times 5^4\times {\mathrm{1031}}^1$

素因数の和:1061

約数の個数: 60

約数和(自身を含む): 50777496

約数和(自身を除く): 30157496

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 625, 800, 1000, 1031, 1250, 2000, 2062, 2500, 4000, 4124, 5000, 5155, 8248, 10000, 10310, 16496, 20000, 20620, 25775, 32992, 41240, 51550, 82480, 103100, 128875, 164960, 206200, 257750, 412400, 515500, 644375, 824800, 1031000, 1288750, 2062000, 2577500, 4124000, 5155000, 10310000, 20620000]

約数ペア:

[(1, 20620000), (2, 10310000), (4, 5155000), (5, 4124000), (8, 2577500), (10, 2062000), (16, 1288750), (20, 1031000), (25, 824800), (32, 644375), (40, 515500), (50, 412400), (80, 257750), (100, 206200), (125, 164960), (160, 128875), (200, 103100), (250, 82480), (400, 51550), (500, 41240), (625, 32992), (800, 25775), (1000, 20620), (1031, 20000), (1250, 16496), (2000, 10310), (2062, 10000), (2500, 8248), (4000, 5155), (4124, 5000)]