12: 1 2 3 4 5 6 10 12 15 20 30 60.
1,2,3,4,5,6,10,12,15,20,30,60
13
Three. The common factors are: 1, 2, 4.
Three. The prime numbers (factors) of 60 are: 2,3,5
There are 2 prime numbers from 60 to 70:61 and 67
5
1 and 3.
There are too many, because numbers go on and on, narrow your search.
There are 30 whole numbers that are odd numbers less than 60 which are also positive. Otherwise, there are infinitely many of them.
For integers, 55 to 64
Many numbers can do that. 1x60 2x30 3x20 4x15 5x12 6x10 after that those numbers go in reverse
There are two prime numbers between 60 and 70.