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# What is a wave length of a light of frequency 7.21 10 14 Hz?

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### What are the factors and prime factors of 721?

721 is a composite number because it has factors other than 1
and itself. It is not a prime number.
The 4 factors of 721 are 1, 7, 103, and 721.
The factor pairs of 721 are 1 x 721 and 7 x 103.
The proper factors of 721 are 1, 7, and 103 or,
if the definition you are using excludes 1, they are 7 and
103.
The prime factors of 721 are 7 and 103.
The 2 distinct prime factors (listing each prime factor
only once) of 721 are 7 and 103.
The prime factorization of 721 is 7 x 103.
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.