What are the factors and prime factors of 26?

The 4 factors of 26 are 1, 2, 13, and 26.

The factor pairs of 26 are 1 x 26 and 2 x 13.

The proper factors of 26 are 1, 2, and 13 or,

if the definition you are using excludes 1, they are 2 and 13.

The prime factors of 26 are 2 and 13.

The 2 distinct prime factors (listing each prime factor only once) of 26 are 2 and 13.

The prime factorization of 26 is 2 x 13.

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.