20819953

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{107}}^1$

素因数の和:170

約数の個数: 36

約数和(自身を含む): 28145232

約数和(自身を除く): 7325279

約数列:

[1, 7, 11, 19, 49, 77, 107, 133, 209, 361, 539, 749, 931, 1177, 1463, 2033, 2527, 3971, 5243, 8239, 10241, 14231, 17689, 22363, 27797, 38627, 57673, 99617, 156541, 194579, 270389, 424897, 1095787, 1892723, 2974279, 20819953]

約数ペア:

[(1, 20819953), (7, 2974279), (11, 1892723), (19, 1095787), (49, 424897), (77, 270389), (107, 194579), (133, 156541), (209, 99617), (361, 57673), (539, 38627), (749, 27797), (931, 22363), (1177, 17689), (1463, 14231), (2033, 10241), (2527, 8239), (3971, 5243)]