1 and 2 are factors of both numbers.
10 does.
30 and 60 They both have 2, 3 and 5 as factors.
Common factors of both numbers are 1 and 2
1 and 2
The factors of 13 are 1 and 13. The factors of 2 are 1 and 2. Both 13 and 2 are prime numbers.
1 and 2 are factors common to both numbers
The prime factors of 60 are 2, 2, 3, and 5.The prime factors of 105 are 3, 5, and 7.The prime numbers that are factors of both 60 and 105 are 3 and 5.
You need 2 numbers to work out any common factors...You are looking for any factors which are common to both numbers.
They both have the factors 2 and 7.
2 and 7 are both prime
1, 2, 4, 8