15和21的公因数有几个

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SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1117179,1062973,1014555,1071121,1120988,1115563,1054926,1132769,1111222,1131171,1111382,1125095,1118268,1065928,1065471,1074843,1058437,1063517,1086530,1045943,1129073,1067473,1062626,1080509,1103841,1053874,1084093,1074216,1119560,1131887) ORDER BY field (ArticleID,1117179,1062973,1014555,1071121,1120988,1115563,1054926,1132769,1111222,1131171,1111382,1125095,1118268,1065928,1065471,1074843,1058437,1063517,1086530,1045943,1129073,1067473,1062626,1080509,1103841,1053874,1084093,1074216,1119560,1131887)