Answer:
A: 63 = 1 x 63, 3 x 21, or 7 x 9. Factors of 63: 1, 3, 7, 9, 21, 63. Prime factorization: 63 = 3 x 3 x 7, which can also be written 63 = 3² x 7.
B: The Greatest Common Factor (GCF) for 63 and 105, notation CGF(63,105), is 21.
Step-by-step explanation: Hope this helped:)