20120639

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{809}}^1$

素因数の和:863

約数の個数: 32

約数和(自身を含む): 27993600

約数和(自身を除く): 7872961

約数列:

[1, 7, 11, 17, 19, 77, 119, 133, 187, 209, 323, 809, 1309, 1463, 2261, 3553, 5663, 8899, 13753, 15371, 24871, 62293, 96271, 107597, 151283, 169081, 261307, 1058981, 1183567, 1829149, 2874377, 20120639]

約数ペア:

[(1, 20120639), (7, 2874377), (11, 1829149), (17, 1183567), (19, 1058981), (77, 261307), (119, 169081), (133, 151283), (187, 107597), (209, 96271), (323, 62293), (809, 24871), (1309, 15371), (1463, 13753), (2261, 8899), (3553, 5663)]