20741721

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{6907}}^1$

素因数の和:6941

約数の個数: 32

約数和(自身を含む): 37137408

約数和(自身を除く): 16395687

約数列:

[1, 3, 7, 11, 13, 21, 33, 39, 77, 91, 143, 231, 273, 429, 1001, 3003, 6907, 20721, 48349, 75977, 89791, 145047, 227931, 269373, 531839, 628537, 987701, 1595517, 1885611, 2963103, 6913907, 20741721]

約数ペア:

[(1, 20741721), (3, 6913907), (7, 2963103), (11, 1885611), (13, 1595517), (21, 987701), (33, 628537), (39, 531839), (77, 269373), (91, 227931), (143, 145047), (231, 89791), (273, 75977), (429, 48349), (1001, 20721), (3003, 6907)]