20657329

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{367}}^1$

素因数の和:445

約数の個数: 32

約数和(自身を含む): 27979776

約数和(自身を除く): 7322447

約数列:

[1, 7, 11, 17, 43, 77, 119, 187, 301, 367, 473, 731, 1309, 2569, 3311, 4037, 5117, 6239, 8041, 15781, 28259, 43673, 56287, 68629, 110467, 173591, 268277, 480403, 1215137, 1877939, 2951047, 20657329]

約数ペア:

[(1, 20657329), (7, 2951047), (11, 1877939), (17, 1215137), (43, 480403), (77, 268277), (119, 173591), (187, 110467), (301, 68629), (367, 56287), (473, 43673), (731, 28259), (1309, 15781), (2569, 8041), (3311, 6239), (4037, 5117)]