How about: 105
1155
30,030 Factorization: 2x3x5x7x11x13
210 with factors of 2, 3, 5, and 7
The smallest number with three different prime factors is 30.
Logically, the smallest number with 4 different prime factors would have to be the product of the smallest four prime numbers. So the smallest natural number with four different prime factors is 210 (2*3*5*7).
How about: 105
1155
30,030 Factorization: 2x3x5x7x11x13
5 and 11
If a number has 5 factors then it most certainly is not prime. Hence there is some confusion as to what you are asking here.
210 with factors of 2, 3, 5, and 7
36
154
The smallest number with three different prime factors is 30.
Just multiply the first three prime numbers together.
70 is the smallest number that has prime factors of 2,5 and 7