Common factors of 20 are; 1,2,4,5, and 20. 1x20=20, 2x10=20, 4x5=20, 5x4=20, 20x1+=20. If you have to show your work then just check mine. The factors of 20 are 1,2,4,5,10 and 20. For them to be common, they have to be compared to another set of factors.

The factors of 20 are: 1, 2, 4, 5, 10, and 20. The prime factors of 20 are: 2 and 5. The factors of 35 are: 1, 5, 7, and 35. The prime factors of 35 are: 5 and 7.

The factors of 15 are: 1, 3, 5, and 15. The prime factors of 15 are: 3 and 5. The factors of 20 are: 1, 2, 4, 5, 10, and 20. The prime factors of 20 are: 2 and 5.

If the question should read, "What are the factors of 20?" The general factors of 20 are : 20, 10, 5, 4, 2 and 1 The prime factors of 20 are : 22 and 5.

The factors of 20 are: 1, 2, 4, 5, 10, and 20. The prime factors of 20 are: 2 and 5. The factors of 50 are: 1, 2, 5, 10, 25, and 50. The prime factors of 50 are: 2 and 5.

The factors of 18 are: 1, 2, 3, 6, 9, and 18. The prime factors of 18 are: 2 and 3. The factors of 20 are: 1, 2, 4, 5, 10, and 20. The prime factors of 20 are: 2 and 5.

The factors of 12 are: 1, 2, 3, 4, 6, and 12. The prime factors of 12 are: 2 and 3. The factors of 20 are: 1, 2, 4, 5, 10, and 20. The prime factors of 20 are: 2 and 5.

The common factors of 16 and 20 are: 1, 2, 4. Factors of 20: 1, 2, 4, 5, 10, and 20 Factors of 16: 1, 2, 4, 8, and 16 The common factors of 20 and 16 are 1, 2, and 4, and the GCF of 20 and 16 is 4.

The factors of 20 are 1, 2, 4, 5, 10, and 20. The factors of 40 are 1, 2, 4, 5, 8, 10, 20, and 40. The common factors of 20 and 40 are 1, 2, 4, 5, 10, and 20. 20 is the greatest common factor of 20 and 40.