18718173

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{137}}^1$

素因数の和:226

約数の個数: 48

約数和(自身を含む): 31000320

約数和(自身を除く): 12282147

約数列:

[1, 3, 9, 17, 19, 47, 51, 57, 137, 141, 153, 171, 323, 411, 423, 799, 893, 969, 1233, 2329, 2397, 2603, 2679, 2907, 6439, 6987, 7191, 7809, 8037, 15181, 19317, 20961, 23427, 44251, 45543, 57951, 109463, 122341, 132753, 136629, 328389, 367023, 398259, 985167, 1101069, 2079797, 6239391, 18718173]

約数ペア:

[(1, 18718173), (3, 6239391), (9, 2079797), (17, 1101069), (19, 985167), (47, 398259), (51, 367023), (57, 328389), (137, 136629), (141, 132753), (153, 122341), (171, 109463), (323, 57951), (411, 45543), (423, 44251), (799, 23427), (893, 20961), (969, 19317), (1233, 15181), (2329, 8037), (2397, 7809), (2603, 7191), (2679, 6987), (2907, 6439)]