Special divisors: Difference between revisions
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m (→{{header|REXX}}: added some comments.) |
SqrtNegInf (talk | contribs) (Added Perl) |
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131 137 139 143 149 151 157 163 167 169 173 179 181 187 191 193 197 199 |
131 137 139 143 149 151 157 163 167 169 173 179 181 187 191 193 197 199 |
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</pre> |
</pre> |
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=={{header|Perl}}== |
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{{libheader|ntheory}} |
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<lang perl>use strict; |
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use warnings; |
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use feature 'say'; |
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use ntheory 'divisors'; |
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my @sd; |
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for my $n (1..199) { |
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sub rev { join '', reverse split '', shift } |
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map { next if $_ != int $_ } map { rev($n) / rev $_ } divisors $n; |
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push @sd, $n; |
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} |
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say scalar(@sd) . " matching numbers:\n" . |
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(sprintf "@{['%4d' x @sd]}", @sd) =~ s/(.{40})/$1\n/gr;</lang> |
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{{out}} |
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<pre>72 matching numbers: |
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1 2 3 4 5 6 7 8 9 11 |
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13 17 19 22 23 26 27 29 31 33 |
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37 39 41 43 44 46 47 53 55 59 |
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61 62 66 67 69 71 73 77 79 82 |
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83 86 88 89 93 97 99 101 103 107 |
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109 113 121 127 131 137 139 143 149 151 |
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157 163 167 169 173 179 181 187 191 193 |
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197 199</pre> |
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=={{header|Phix}}== |
=={{header|Phix}}== |
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