The greatest common factor of 87 and 78
87=3×29, 78=2×39=2×3× 13, and its * * * is 3, so the greatest common factor of 87 and 78 is 3. There are many ways to find the greatest common factor, and the most commonly used method is this prime factor decomposition method, which decomposes a composite number into the products of several prime factors, and then their greatest common factors can be obtained.
What is the greatest common divisor?
The greatest common factor, also called the greatest common factor and the greatest common factor, refers to the largest divisor of two or more integers. The greatest common divisor of a and b is (a, b), the same greatest common divisor of a, b and c is (a, b, c), and the greatest common divisor of multiple integers also has the same symbol. The methods to find the greatest common divisor include prime factor decomposition, short division, division by turns and polyphase subtraction.
Note that factorization prime factor is only for composite numbers, and factorization prime factor is also called factorization prime factor. To factorize a number, we should divide it from the smallest prime number until the result is a prime number. The formula for decomposing prime factors is called short division, which is similar in nature to division and can also be used to find the common factor of multiple numbers.