What are the factors and prime factors of 1997?

1997 is a Prime number. The only two factors of a prime number are 1 and itself.

The two factors of 1997 are 1 and 1997. There are only two factors of a prime number.

The only factor pair of 1997 is 1 x 1997. There is only one factor pair of a prime number.

The proper factors of 1997 are only 1 or,

if the definition you are using excludes 1, there are none.

The only prime factor of 1997 is 1997. There is only one prime factor of a prime number - itself.

The distinct prime factor of 1997 is also 1997, since there is no repetition of factors.

The prime factorization of 1997 is 1997. In some cases, to emphasize that it is prime, you might write the prime factorization as 1 x 1997.

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.