6 is.
6
1155
10
Among positive integers, 6
The smallest prime factors are 2,3,5,7 thus the smallest number would be the product of these will be 210
6
The smallest number that has both twenty-four and thirty as factors is 120.
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).
1155
10
Among positive integers, 6
6: 1, 2, 3, 6
3
This depends on what you mean by smallest. The smallest four-digit whole number is 1,000; the smallest four-digit real number is .0001 (1/10,000); the smallest four-digit integer is -9,999.
10, which has the factors 1,2,5 and 10. If the trivial pair 1 and the number itself are disallowed, the answer is 12 with factors 2,3,4 and 6.
The smallest prime factors are 2,3,5,7 thus the smallest number would be the product of these will be 210
That would be the same as the smallest four-digit even number: 1,000, which also happens to be the smallest four-digit whole number.