Express each number as a product of its prime factors `(i) 140          \    (ii) 156         \    (iii) 3825       \   (iv) 5005       \     (v) 7429`

Explanation

To express each number as a product of its prime factors, we will perform prime factorization step by step for each number.

### (i) Prime Factorization of 140
1. **Divide by 2** (the smallest prime number):
\( 140 \div 2 = 70 \)
So, we have \( 140 = 2 \times 70 \).

2. **Divide 70 by 2**:
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