use Prime::Factor:ver<0.3.0+>; say "{+$_} matching numbers:\n{.batch(10)».fmt('%3d').join: "\n"}" given (1..^200).grep: { all .flip «%%« .&divisors».flip };
72 matching numbers: 1 2 3 4 5 6 7 8 9 11 13 17 19 22 23 26 27 29 31 33 37 39 41 43 44 46 47 53 55 59 61 62 66 67 69 71 73 77 79 82 83 86 88 89 93 97 99 101 103 107 109 113 121 127 131 137 139 143 149 151 157 163 167 169 173 179 181 187 191 193 197 199
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