Just 1.
The common factors of 187 and 221 are 1 and 17
The factors of 17 are: 1, 17 The factors of 187 are: 1, 11, 17, 187 The common factors are: 1, 17
The factors of 187 are 1, 11, 17 and 187. For them to be common, they need to be compared to another set of factors.
187 is a composite number because it has factors other than 1 and itself. It is not a prime number.The 4 factors of 187 are 1, 11, 17, and 187.The factor pairs of 187 are 1 x 187 and 11 x 17.The proper factors of 187 are 1, 11, and 17 or,if the definition you are using excludes 1, they are 11 and 17.The prime factors of 187 are 11 and 17.The 2 distinct prime factors (listing each prime factor only once) of 187 are 11 and 17.The prime factorization of 187 is 11 x 17.NOTE: There cannot be common factors, a greatest common factor, or a least common multiple because "common" refers to factors or multiples that two or more numbers have in common.
1 and 11
They are 1 and 11.
11 and 1
The common factors of 18 and 36 are 18,9,6,3,2,1.
The common factors of 374 and 561 are: 1, 11, 17, and 187
The common factors of 27 and 36 are 1, 3 and 9.
The common factors of 36 and 40 are 1,2 and 4.
Since 12 is a factor of 36, all of the factors of 12 are common to 36.