Use a factor tree. 36 18,2 9,2,2 3,3,2,2
36
The factors of 21 are 1, 3, 7, and 21. The factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, and 36. The factors they have in common are 1 and 3, the largest of which is 3, so 3 is the greatest common factor. Or, you can calculate the greatest common factor by looking at the prime factors. The prime factors of 21 are 3 and 7. The prime factors of 36 are 2, 2, 3, and 3. The prime factors they have in common are a single 3, so 3 is the greatest common factor.
To find this, you first need to split the numbers down into their prime factors. In this case you get: 21 = 3x7 36 = 2x2x3x3 The next step is to identify any common prime factors. In this case the only common prime factor is 3. Therefore the HCF of 21 and 36 is 3.
You can figure this out quickly by separating the number into prime factors. Then, take two of each prime factor, until you can't take any more, and multiply them together.
9 is a factor of 36, but it is not prime.
The prime factors of 36 are 2 & 3
36 has two prime factors: 2 and 3.
As a product of its prime factors it is: 223*3 = 36
77 is not a prime number. 36 is not a prime number. 77 and 36 are mutually prime as the only common factor they have is 1.
The prime numbers also the factors of 36 is...............THREE & TWO
36 = 729
36 = 22 x 32
As a product of its prime factors: 2*2*3*3 = 36
45 and 36 are not relatively prime because they have 3 as a common factor.
Factors: 1, 2, 3, 4, 6, 9, 12, 18, 36.Prime Factors: 2, 3
For 32, 2 For 36, 2 and 3