6. Factors are 1, 2, 3, and 6.
4 : with factors 1, 2 and 4
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).
72 is the second-smallest number with 12 factors. Its divisors are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, and 72. The smallest number with 12 factors is 60. Its divisors are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60.
1000 is the smallest 4 digit number but of the two factors, it is only divisible by 2. As 999 is obviously divisible by 3 then 999 + 3 = 1002 is also divisible by 3 and, as an even number, is also divisible by 2. The answer is 1002
If you mean 2, 3 and 7 as factors then the smallest number is 42
36
Since 3 is prime, the factors are 1 and 3.
There are none but the smallest 3 digit number is 161
It is: 30
6. Factors are 1, 2, 3, and 6.
4 : with factors 1, 2 and 4
How about 6 whose factors are 1, 2, 3 and 6
The smallest factor of any positive integer is 1.
The smallest number with three different prime factors is 30.
84
42