関連ワード:  hcf prime factorization method 72    find the hcf by prime factorization method 72 90    find the hcf using prime factorization method 72 86 90    find the hcf by prime factorization method 72 and 84    find the hcf by prime factorization method 72 and 126    hcf by prime factorization method 63 18 72    hcf by prime factorization method 40 48 and 72    find hcf using prime factorization method 48 72    find the hcf by prime factorization method 54 72 90    find the hcf by prime factorization method 56 72