This problem can be solved without sorting or a large list of primes by just calculating factors as we concatenate them to a group organized by rad(n)
?View Code PYTHON1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
limit=100000
target=10000
rad={}
buf={}
for i in range(1,limit+1):
rad[i]=1
for j in range(1,limit+1):
buf[j]=""
for i in range(2,limit+1):
if rad[i]==1:
for j in range(i,limit+1,i):
rad[j]=rad[j]*i
hey=rad[i]
buf[hey]=buf[hey]+" "+str(i)
str=""
for i in [...]