What are the common factors of 147 and 294?

Factors for 147: 1, 3, 7, 21, 49, 147

Factors for 294: 1, 2, 3, 6, 7, 14, 21, 42, 49, 98, 147, 294

Common Factors: 1, 3, 7, 21, 49, 147