7^2 x 13
Chat with our AI personalities
637 = 7 * 7 * 13 = 72 * 13
Writing down all the factors of both numbers requires too much time so it is not a good idea to find solution by writing each factor of both numbers. Method of prime factorization is one of the good methods to find GCF. Prime factorization is like breaking a number into other numbers, prime numbers, and this factorization is unique. Prime factorization is like a blueprint for numbers. Prime factorization of 1820 = 22 x 5 x 7 x 13 Prime factorization of 637 = 7 x 7 x 13 7, 13 and 7x13 are common in the prime factorization of both numbers, but 7x13 is the greatest among these numbers. So, 7x13 = 91 is the GCF of 1820 and 637.
7, 11, 13, 49, 77, 121, 143, 169, 539, 637, 847, 1,001, 1,183, 1,573, 1,859, 5,929, 7,007, 8,281, 11,011, 13,013, 20,449, 77,077, 91,091, 143,143, 1,002,001
The factors of 637 are: 1 7 13 49 91 637
The factors of 8281 are 1, 7, 13, 49, 91, 169, 637, 1183, and 8281. The prime factors of 8281 are 7, 7, 13, and 13.