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Numbers whose count of divisors is prime: Difference between revisions
Numbers whose count of divisors is prime (view source)
Revision as of 04:27, 11 July 2021
, 2 years ago→{{header|REXX}}: added stretch goal output.
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=={{header|REXX}}==
Some optimization was added so as to bypass finding divisors for primes.
<lang rexx>/*REXX pgm finds positive integers N whose count of divisors is prime, where N < 1000.*/
parse arg hi cols . /*obtain optional arguments from the CL*/
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Found 16 positive integers N whose number of divisors is prime, where N < 1,000
</pre>
{{out|output|text= when using the input of: <tt> 100000 </tt>}}
<pre>
index │ positive integers N whose number of divisors is prime, where N < 100,000
───────┼───────────────────────────────────────────────────────────────────────────────────────────────────────────────
1 │ 4 9 16 25 49 64 81 121 169 289
11 │ 361 529 625 729 841 961 1,024 1,369 1,681 1,849
21 │ 2,209 2,401 2,809 3,481 3,721 4,096 4,489 5,041 5,329 6,241
31 │ 6,889 7,921 9,409 10,201 10,609 11,449 11,881 12,769 14,641 15,625
41 │ 16,129 17,161 18,769 19,321 22,201 22,801 24,649 26,569 27,889 28,561
51 │ 29,929 32,041 32,761 36,481 37,249 38,809 39,601 44,521 49,729 51,529
61 │ 52,441 54,289 57,121 58,081 59,049 63,001 65,536 66,049 69,169 72,361
71 │ 73,441 76,729 78,961 80,089 83,521 85,849 94,249 96,721 97,969
───────┴───────────────────────────────────────────────────────────────────────────────────────────────────────────────
Found 79 positive integers N whose number of divisors is prime, where N < 100,000
=={{header|Ring}}==
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