41, 43 and 47 are the prime numbers between 40 and 50. Any nonzero number can be a factor.
10
It is 1 because 7 is a prime number and is not a factor of 50
41 43 47
21 is not a prime factor, it is 3 x 7
64
78
You are 54.
200
4 is a prime factor of 20 whereas it isn't a factor of 50.
50 is not a prime factor or a prime number because it has more than two factors and so it is a composite number
No multiple of 86 is in that range. 43 is a prime number that is a factor of 86.
50 25,2 5,5,2