Factor Tree of 520: ........520 ......../ \ ....104 5 ...../ \ ...4..26 ../\.. /\ 2 2 2 13
The greatest common factor of 198 and 520 is 2.
The GCF is 5.
1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520
35 can be a factor, but it is not prime.
520. 13 is a prime number and not a factor of 40.
The prime factors of 520 are: 2 5 13
Factor Tree of 520: ........520 ......../ \ ....104 5 ...../ \ ...4..26 ../\.. /\ 2 2 2 13
The greatest common factor of 198 and 520 is 2.
2,2,2,5,13
520 = 2 × 2 × 2 × 5 × 13
The factors of 520 are 1 2 4 5 8 10 13 20 26 40 52 65 104 130 260 520 The prime factorization of 520 is 23 x 5 x 13
520/390 taking 130 as common factor = 4:3
23*5*13
520 / \ 2 260 / \ 130 2 / \ 65 2 / \ 5 13
A factor can or cannot be a prime number Ex: 2 is the factor of all other even numbers its a prime number but 9 is a factor of 18 and its not a prime number A prime is a factor but a factor being a prime number varies
The greatest common factor (GCF) of 45 and 20 is 5.Prime factors:45 = 5×3×320 = 5×2×2the only prime factor in both is 5, and so the highest common factor is 5.Alternative method:45 mod 20 = 520 mod 5 = 0so HCF = 5.