19991818

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{3019}}^1$

素因数の和:3082

約数の個数: 32

約数和(自身を含む): 38269440

約数和(自身を除く): 18277622

約数列:

[1, 2, 7, 11, 14, 22, 43, 77, 86, 154, 301, 473, 602, 946, 3019, 3311, 6038, 6622, 21133, 33209, 42266, 66418, 129817, 232463, 259634, 464926, 908719, 1427987, 1817438, 2855974, 9995909, 19991818]

約数ペア:

[(1, 19991818), (2, 9995909), (7, 2855974), (11, 1817438), (14, 1427987), (22, 908719), (43, 464926), (77, 259634), (86, 232463), (154, 129817), (301, 66418), (473, 42266), (602, 33209), (946, 21133), (3019, 6622), (3311, 6038)]