19811799

素因数分解:

$3^2\times 7^1\times {\mathrm{107}}^1\times {\mathrm{2939}}^1$

素因数の和:3059

約数の個数: 24

約数和(自身を含む): 33022080

約数和(自身を除く): 13210281

約数列:

[1, 3, 7, 9, 21, 63, 107, 321, 749, 963, 2247, 2939, 6741, 8817, 20573, 26451, 61719, 185157, 314473, 943419, 2201311, 2830257, 6603933, 19811799]

約数ペア:

[(1, 19811799), (3, 6603933), (7, 2830257), (9, 2201311), (21, 943419), (63, 314473), (107, 185157), (321, 61719), (749, 26451), (963, 20573), (2247, 8817), (2939, 6741)]