19990168

素因数分解:

$2^3\times {\mathrm{11}}^2\times {\mathrm{107}}^1\times {\mathrm{193}}^1$

素因数の和:328

約数の個数: 48

約数和(自身を含む): 41799240

約数和(自身を除く): 21809072

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 107, 121, 193, 214, 242, 386, 428, 484, 772, 856, 968, 1177, 1544, 2123, 2354, 4246, 4708, 8492, 9416, 12947, 16984, 20651, 23353, 25894, 41302, 46706, 51788, 82604, 93412, 103576, 165208, 186824, 227161, 454322, 908644, 1817288, 2498771, 4997542, 9995084, 19990168]

約数ペア:

[(1, 19990168), (2, 9995084), (4, 4997542), (8, 2498771), (11, 1817288), (22, 908644), (44, 454322), (88, 227161), (107, 186824), (121, 165208), (193, 103576), (214, 93412), (242, 82604), (386, 51788), (428, 46706), (484, 41302), (772, 25894), (856, 23353), (968, 20651), (1177, 16984), (1544, 12947), (2123, 9416), (2354, 8492), (4246, 4708)]