20512205

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1\times {\mathrm{307}}^1$

素因数の和:425

約数の個数: 32

約数和(自身を含む): 29804544

約数和(自身を除く): 9292339

約数列:

[1, 5, 7, 23, 35, 83, 115, 161, 307, 415, 581, 805, 1535, 1909, 2149, 2905, 7061, 9545, 10745, 13363, 25481, 35305, 49427, 66815, 127405, 178367, 247135, 586063, 891835, 2930315, 4102441, 20512205]

約数ペア:

[(1, 20512205), (5, 4102441), (7, 2930315), (23, 891835), (35, 586063), (83, 247135), (115, 178367), (161, 127405), (307, 66815), (415, 49427), (581, 35305), (805, 25481), (1535, 13363), (1909, 10745), (2149, 9545), (2905, 7061)]