What are common numbers of 65 and 145?

The common numbers of 65 and 145 are the multiples of their least common multiple (LCM). To find the LCM, we first determine the prime factorizations: 65 is 5 × 13, and 145 is 5 × 29. The LCM is 5 × 13 × 29 = 1895, so the common numbers are multiples of 1895, such as 1895, 3790, 5685, and so on.