Product of min and max prime factors

1..100 -> map {|n| lpf(n) * gpf(n) }.slices(10).each {|a|
    a.map{ '%5s' % _ }.join(' ').say
}

Output:

    1     4     9     4    25     6    49     4     9    10
  121     6   169    14    15     4   289     6   361    10
   21    22   529     6    25    26     9    14   841    10
  961     4    33    34    35     6  1369    38    39    10
 1681    14  1849    22    15    46  2209     6    49    10
   51    26  2809     6    55    14    57    58  3481    10
 3721    62    21     4    65    22  4489    34    69    14
 5041     6  5329    74    15    38    77    26  6241    10
    9    82  6889    14    85    86    87    22  7921    10
   91    46    93    94    95     6  9409    14    33    10