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 the smallest prime number (2)**:
- \( 140 \div 2 = 70 \)
2. **Divide 70 by 2**:
- \( 70 \div 2 = 35 \)
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