21379655

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{499}}^1$

素因数の和:575

約数の個数: 32

約数和(自身を含む): 30240000

約数和(自身を除く): 8860345

約数列:

[1, 5, 11, 19, 41, 55, 95, 205, 209, 451, 499, 779, 1045, 2255, 2495, 3895, 5489, 8569, 9481, 20459, 27445, 42845, 47405, 102295, 104291, 225049, 388721, 521455, 1125245, 1943605, 4275931, 21379655]

約数ペア:

[(1, 21379655), (5, 4275931), (11, 1943605), (19, 1125245), (41, 521455), (55, 388721), (95, 225049), (205, 104291), (209, 102295), (451, 47405), (499, 42845), (779, 27445), (1045, 20459), (2255, 9481), (2495, 8569), (3895, 5489)]