Common factors the last one is 30, 84 , 126

All these numbers eventually have a common factor, A number that can be reached by multiplying different numbers, like 6 x 4 = 24 and 8 x 3 = 24.
You can list them, or find them different ways. For example 48 x 10 = 480 and 20 x 24 = 480. 48 and 20 share this ability to reach 480 through multiplication