21178787

素因数分解:

$7^1\times {\mathrm{17}}^2\times {\mathrm{19}}^2\times {\mathrm{29}}^1$

素因数の和:108

約数の個数: 36

約数和(自身を含む): 28072080

約数和(自身を除く): 6893293

約数列:

[1, 7, 17, 19, 29, 119, 133, 203, 289, 323, 361, 493, 551, 2023, 2261, 2527, 3451, 3857, 5491, 6137, 8381, 9367, 10469, 38437, 42959, 58667, 65569, 73283, 104329, 159239, 177973, 730303, 1114673, 1245811, 3025541, 21178787]

約数ペア:

[(1, 21178787), (7, 3025541), (17, 1245811), (19, 1114673), (29, 730303), (119, 177973), (133, 159239), (203, 104329), (289, 73283), (323, 65569), (361, 58667), (493, 42959), (551, 38437), (2023, 10469), (2261, 9367), (2527, 8381), (3451, 6137), (3857, 5491)]