20855107

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{17}}^2\times {\mathrm{61}}^1$

素因数の和:128

約数の個数: 36

約数和(自身を含む): 27865776

約数和(自身を除く): 7010669

約数列:

[1, 7, 13, 17, 61, 91, 119, 169, 221, 289, 427, 793, 1037, 1183, 1547, 2023, 2873, 3757, 5551, 7259, 10309, 13481, 17629, 20111, 26299, 48841, 72163, 94367, 123403, 175253, 229177, 341887, 1226771, 1604239, 2979301, 20855107]

約数ペア:

[(1, 20855107), (7, 2979301), (13, 1604239), (17, 1226771), (61, 341887), (91, 229177), (119, 175253), (169, 123403), (221, 94367), (289, 72163), (427, 48841), (793, 26299), (1037, 20111), (1183, 17629), (1547, 13481), (2023, 10309), (2873, 7259), (3757, 5551)]