The fundamental theorem of arithmetic states that any integer which is greater than 1 can be written or described as a prime number or combination of multiple of prime numbers keeping the order of the prime numbers ignored.
Question 4
Following is the tree diagram of 128:
128 ? 2 x 64 ? (64) ? 2 x 32 ? (32) ? 2 x 16 ? (16) ? 2 x 8 ? (8) ? 2 x 4 ? (4) ? 2x2.