20971573

素因数分解:

$7^1\times {\mathrm{19}}^2\times {\mathrm{43}}^1\times {\mathrm{193}}^1$

素因数の和:281

約数の個数: 24

約数和(自身を含む): 26017728

約数和(自身を除く): 5046155

約数列:

[1, 7, 19, 43, 133, 193, 301, 361, 817, 1351, 2527, 3667, 5719, 8299, 15523, 25669, 58093, 69673, 108661, 157681, 487711, 1103767, 2995939, 20971573]

約数ペア:

[(1, 20971573), (7, 2995939), (19, 1103767), (43, 487711), (133, 157681), (193, 108661), (301, 69673), (361, 58093), (817, 25669), (1351, 15523), (2527, 8299), (3667, 5719)]