20984579

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{23}}^1\times {\mathrm{41}}^1$

素因数の和:116

約数の個数: 48

約数和(自身を含む): 29707776

約数和(自身を除く): 8723197

約数列:

[1, 7, 11, 17, 23, 41, 77, 119, 161, 187, 253, 287, 289, 391, 451, 697, 943, 1309, 1771, 2023, 2737, 3157, 3179, 4301, 4879, 6601, 6647, 7667, 10373, 11849, 16031, 22253, 30107, 46529, 53669, 72611, 73117, 82943, 112217, 130339, 176341, 272527, 511819, 912373, 1234387, 1907689, 2997797, 20984579]

約数ペア:

[(1, 20984579), (7, 2997797), (11, 1907689), (17, 1234387), (23, 912373), (41, 511819), (77, 272527), (119, 176341), (161, 130339), (187, 112217), (253, 82943), (287, 73117), (289, 72611), (391, 53669), (451, 46529), (697, 30107), (943, 22253), (1309, 16031), (1771, 11849), (2023, 10373), (2737, 7667), (3157, 6647), (3179, 6601), (4301, 4879)]