I divisori di 990009 sono 16, elencati qui di seguito: 1; 3; 9; 27; 37; 111; 333; 991; 999; 2973; 8919; 26757; 36667; 110001; 330003; 990009
989990, 989991, 989992, 989993, 989994, 989995, 989996, 989997, 989998, 989999, 990000, 990001, 990002, 990003, 990004, 990005, 990006, 990007, 990008, 990010, 990011, 990012, 990013, 990014, 990015, 990016, 990017, 990018, 990019, 990020, 990021, 990022, 990023, 990024, 990025, 990026, 990027, 990028