30 and 60
315 has factors 3,3.5,7. 356 has factors of 2,2,89. There are no common factors between these two numbers , except '1'.
356 is a composite number because it has factors other than 1 and itself. It is not a prime number.The 6 factors of 356 are 1, 2, 4, 89, 178, and 356.The factor pairs of 356 are 1 x 356, 2 x 178, and 4 x 89.The proper factors of 356 are 1, 2, 4, 89, and 178 or,if the definition you are using excludes 1, they are 2, 4, 89, and 178.The prime factors of 356 are 2, 2, and 89. Note: There is repetition of these factors, so if the prime factors are being listed instead of the prime factorization, usually only the distinct prime factors are listed.The 2 distinct prime factors (listing each prime factor only once) of 356 are 2 and 89.The prime factorization of 356 is 2 x 2 x 89 or, in index form (in other words, using exponents), 22 x 89.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.
Common factors are factors that are the same for two or more numbers.
Two or more numbers are needed to find the GCF
The greatest of the common factors of two or more numbers is the GCF
They are called common factors when they are the same for two or more numbers. They are factors that are common to both number.
All nonzero numbers have factors. Some numbers have some of the same factors as other numbers. These are known as common factors. Pick two numbers. Write down their factors. The numbers that appear on both lists are common factors.
40 and 21 have no common prime factors
You need at least two numbers to find a GCF.
Common Factors
There are no common factors of 6 because there cannot be common factors without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. Thus, there cannot be a least common factor. In general, the least common factor of two numbers is 1.
The least common factor for two numbers is always one. The least common multiple for two numbers which have no common factors greater than one is their product.