20803195

素因数分解:

$5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1$

素因数の和:188

約数の個数: 48

約数和(自身を含む): 31600800

約数和(自身を除く): 10797605

約数列:

[1, 5, 7, 19, 35, 41, 49, 95, 109, 133, 205, 245, 287, 545, 665, 763, 779, 931, 1435, 2009, 2071, 3815, 3895, 4469, 4655, 5341, 5453, 10045, 10355, 14497, 22345, 26705, 27265, 31283, 38171, 72485, 84911, 101479, 156415, 190855, 218981, 424555, 507395, 594377, 1094905, 2971885, 4160639, 20803195]

約数ペア:

[(1, 20803195), (5, 4160639), (7, 2971885), (19, 1094905), (35, 594377), (41, 507395), (49, 424555), (95, 218981), (109, 190855), (133, 156415), (205, 101479), (245, 84911), (287, 72485), (545, 38171), (665, 31283), (763, 27265), (779, 26705), (931, 22345), (1435, 14497), (2009, 10355), (2071, 10045), (3815, 5453), (3895, 5341), (4469, 4655)]