16820181

素因数分解:

$3^2\times 7^2\times {\mathrm{43}}^1\times {\mathrm{887}}^1$

素因数の和:950

約数の個数: 36

約数和(自身を含む): 28952352

約数和(自身を除く): 12132171

約数列:

[1, 3, 7, 9, 21, 43, 49, 63, 129, 147, 301, 387, 441, 887, 903, 2107, 2661, 2709, 6209, 6321, 7983, 18627, 18963, 38141, 43463, 55881, 114423, 130389, 266987, 343269, 391167, 800961, 1868909, 2402883, 5606727, 16820181]

約数ペア:

[(1, 16820181), (3, 5606727), (7, 2402883), (9, 1868909), (21, 800961), (43, 391167), (49, 343269), (63, 266987), (129, 130389), (147, 114423), (301, 55881), (387, 43463), (441, 38141), (887, 18963), (903, 18627), (2107, 7983), (2661, 6321), (2709, 6209)]