Factor-perfect numbers: Difference between revisions
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(→{{header|J}}: include first seven factor-perfect numbers) |
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<syntaxhighlight lang=J>factors=: {{/:~*/@>,{(^ i.)&.>/0 1+__ q:y}} |
<syntaxhighlight lang=J>factors=: {{/:~*/@>,{(^ i.)&.>/0 1+__ q:y}} |
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fp1=: {{ {{y#~0*/ .=~2|/\&>y}} y<@#"1~1,.~1,.#:i.2^_2+#y }}@factors |
fp1=: {{ {{y#~0*/ .=~2|/\&>y}} y<@#"1~1,.~1,.#:i.2^_2+#y }}@factors |
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fp2=: 2 %~/\&.> fp1 |
fp2=: 2 %~/\&.> fp1 |
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Fi=: i.0 |
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F=: {{ |
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if. y>:#Fi do. Fi=: Fi{.~1+y end. |
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if. (1<y)*0=y{Fi do. Fi=: Fi y}~ 1++/F y%}.factors y end. |
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y{Fi |
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}}"0</syntaxhighlight> |
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Task examples (formed into 8 columns for easy viewing): |
Task examples (formed into 8 columns for easy viewing): |
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<syntaxhighlight lang=J> _8,\fp1 48 |
<syntaxhighlight lang=J> _8,\fp1 48 |
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├───────┼───────┼───────┼─────────┼─────────┼───────┼─────────┼─────────┤ |
├───────┼───────┼───────┼─────────┼─────────┼───────┼─────────┼─────────┤ |
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│2 2 12 │2 2 6 2│2 2 4 3│2 2 3 4 │2 2 3 2 2│2 2 2 6│2 2 2 3 2│2 2 2 2 3│ |
│2 2 12 │2 2 6 2│2 2 4 3│2 2 3 4 │2 2 3 2 2│2 2 2 6│2 2 2 3 2│2 2 2 2 3│ |
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└───────┴───────┴───────┴─────────┴─────────┴───────┴─────────┴─────────┘ |
└───────┴───────┴───────┴─────────┴─────────┴───────┴─────────┴─────────┘ |
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0 1,(#~ (=F)) 2+i.30000 |
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0 1 48 1280 2496 28672 29808 |
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</syntaxhighlight> |
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=={{header|Julia}}== |
=={{header|Julia}}== |
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