28276389

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:250

約数の個数: 48

約数和(自身を含む): 46500480

約数和(自身を除く): 18224091

約数列:

[1, 3, 9, 17, 19, 51, 57, 71, 137, 153, 171, 213, 323, 411, 639, 969, 1207, 1233, 1349, 2329, 2603, 2907, 3621, 4047, 6987, 7809, 9727, 10863, 12141, 20961, 22933, 23427, 29181, 44251, 68799, 87543, 132753, 165359, 184813, 206397, 398259, 496077, 554439, 1488231, 1663317, 3141821, 9425463, 28276389]

約数ペア:

[(1, 28276389), (3, 9425463), (9, 3141821), (17, 1663317), (19, 1488231), (51, 554439), (57, 496077), (71, 398259), (137, 206397), (153, 184813), (171, 165359), (213, 132753), (323, 87543), (411, 68799), (639, 44251), (969, 29181), (1207, 23427), (1233, 22933), (1349, 20961), (2329, 12141), (2603, 10863), (2907, 9727), (3621, 7809), (4047, 6987)]