81680291

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{2713}}^1$

素因数の和:2771

約数の個数: 32

約数和(自身を含む): 112555008

約数和(自身を除く): 30874717

約数列:

[1, 7, 11, 17, 23, 77, 119, 161, 187, 253, 391, 1309, 1771, 2713, 2737, 4301, 18991, 29843, 30107, 46121, 62399, 208901, 322847, 436793, 507331, 686389, 1060783, 3551317, 4804723, 7425481, 11668613, 81680291]

約数ペア:

[(1, 81680291), (7, 11668613), (11, 7425481), (17, 4804723), (23, 3551317), (77, 1060783), (119, 686389), (161, 507331), (187, 436793), (253, 322847), (391, 208901), (1309, 62399), (1771, 46121), (2713, 30107), (2737, 29843), (4301, 18991)]