70
70 is the smallest number that has prime factors of 2,5 and 7
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).
The smallest number with three different prime factors is 30.
There isn't one. Negative numbers have prime factors and numbers don't stop. The smallest positive numbers with a prime factor is 2.
Starting from beginning we see that 0 has infinite factors so it is a composite number and 1 is neither prime nor composite. The next number is 2 which has only two factors so it is the smallest Prime number.
Oh, dude, the smallest number with 2, 5, and 7 as prime factors is 70. It's like the VIP of numbers, with all those cool prime factors hanging out together. So, yeah, 70 is the magic number you're looking for.
It is: 30
70
The smallest prime number is '2' (TWO).. It is also the only even prime number.
It is 11 which is a prime number whose factors are itself and one
5 and 11
42