21808105

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{509}}^1$

素因数の和:585

約数の個数: 32

約数和(自身を含む): 30844800

約数和(自身を除く): 9036695

約数列:

[1, 5, 11, 19, 41, 55, 95, 205, 209, 451, 509, 779, 1045, 2255, 2545, 3895, 5599, 8569, 9671, 20869, 27995, 42845, 48355, 104345, 106381, 229559, 396511, 531905, 1147795, 1982555, 4361621, 21808105]

約数ペア:

[(1, 21808105), (5, 4361621), (11, 1982555), (19, 1147795), (41, 531905), (55, 396511), (95, 229559), (205, 106381), (209, 104345), (451, 48355), (509, 42845), (779, 27995), (1045, 20869), (2255, 9671), (2545, 8569), (3895, 5599)]