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SyntaxError
The possibilities are endless

If we're talking between 1-20

then the numbers divisible by 2 and 6 are

18,12,6
ileenem
all prime numbers are divisible by 2 and 6 for sure such as 
2,4,6,8,10,12,14,16,18,20 and also
6,12,18,24,30,36,42,48,54,60,66,72,78,84.90