20112785

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{439}}^1$

素因数の和:486

約数の個数: 48

約数和(自身を含む): 32503680

約数和(自身を除く): 12390895

約数列:

[1, 5, 7, 11, 17, 35, 49, 55, 77, 85, 119, 187, 245, 385, 439, 539, 595, 833, 935, 1309, 2195, 2695, 3073, 4165, 4829, 6545, 7463, 9163, 15365, 21511, 24145, 33803, 37315, 45815, 52241, 82093, 107555, 169015, 236621, 261205, 365687, 410465, 574651, 1183105, 1828435, 2873255, 4022557, 20112785]

約数ペア:

[(1, 20112785), (5, 4022557), (7, 2873255), (11, 1828435), (17, 1183105), (35, 574651), (49, 410465), (55, 365687), (77, 261205), (85, 236621), (119, 169015), (187, 107555), (245, 82093), (385, 52241), (439, 45815), (539, 37315), (595, 33803), (833, 24145), (935, 21511), (1309, 15365), (2195, 9163), (2695, 7463), (3073, 6545), (4165, 4829)]