Book Maths Puzzle

The product of two numbers is 2028 and their HCF is 13. What are the number of such pairs?

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Book Other Question

N is the greatest number which divides 1305, 4665 and 6905 and gives the same remainder in each case. What is the sum of the digits in N? The product of two 2 digit numbers is 2028 and their HCF is 13. What are the numbers ?