The prime factors of 15 are 3 and 5.
The prime factors are: 5, 5, 3 and 13
As a product of its prime factors: 3*3*3*5 = 135
All of them are prime numbers
36
They are: 3 3 and 5
3, 3, 2, and 5
The largest prime factor of 30 is 5 and its other prime factors are 2 and 3
3 and 5
As a product of its prime factors: 3*3*5*5*7 = 1575
5 The prime factors of 30 are 2, 3, 5
You do not. To have a greatest common factor, you need two or more numbers. A common factor is a factor that two or more number have in common. However, the prime factorization of all the numbers will help you find the greatest common factor. The greatest common factor will be the prime factors they have in common multiplied together. Example: The prime factors of 45 are 3, 3, and 5. The prime factors of 60 are 2, 2, 3, and 5. The common prime factors are 3 and 5, so the greatest common factor is 3 x 5 = 15.