19947279

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{641}}^1$

素因数の和:719

約数の個数: 32

約数和(自身を含む): 31062528

約数和(自身を除く): 11115249

約数列:

[1, 3, 11, 23, 33, 41, 69, 123, 253, 451, 641, 759, 943, 1353, 1923, 2829, 7051, 10373, 14743, 21153, 26281, 31119, 44229, 78843, 162173, 289091, 486519, 604463, 867273, 1813389, 6649093, 19947279]

約数ペア:

[(1, 19947279), (3, 6649093), (11, 1813389), (23, 867273), (33, 604463), (41, 486519), (69, 289091), (123, 162173), (253, 78843), (451, 44229), (641, 31119), (759, 26281), (943, 21153), (1353, 14743), (1923, 10373), (2829, 7051)]