105 = 3*5*7
213 = 3*71
501 = 3*167
234 = 2*3*3*13
600 = 2*2*2*3*5*5
420 = 2*2*3*5*7
Each number is unique in its own way. You pick.
234 is the only one with a factor of 3^2. All others only have 3^1 as a factor.
600 is the only one with a cubic factor. None of the others has a factor to a higher power than 2.
501 is the only one with a factor greater than 100.
420 is the only one with 4 distinct factors. All the others have 3 or fewer distinct factors.
105 is the only one that is a factor of one of the other listed numbers.
213 = 3*71
501 = 3*167
234 = 2*3*3*13
600 = 2*2*2*3*5*5
420 = 2*2*3*5*7
Each number is unique in its own way. You pick.
234 is the only one with a factor of 3^2. All others only have 3^1 as a factor.
600 is the only one with a cubic factor. None of the others has a factor to a higher power than 2.
501 is the only one with a factor greater than 100.
420 is the only one with 4 distinct factors. All the others have 3 or fewer distinct factors.
105 is the only one that is a factor of one of the other listed numbers.