8 has three primes (2x2x2) in its factorization, and 30 is the smallest number having three different primes (2x3x5) in its factorization.
Every member of that infinite list is different.
No.
Yes.
The smallest number that has six different primes in its prime factorization is 30030 (2 x 3 x 5 x 7 x 11 x 13).
Two.
1023
30 and 42
The only number that has only one factor is '1'. Every other number has at least two factors: '1' and itself. If there are no more than that, then the number is a prime number.
2 x 3 x 5 x 7 x 11 x 13 x 17 = 510,510
The Least Common Multiple (LCM) is the smallest number that two or more numbers will divide into evenly.
30