Concept:Any number can be written as a product of prime factors. The total number of its factors is found by adding 1 to each exponent and multiplying these results.Explanation:First, find the prime factors of 105. 105 = 3 × 5 × 7. Each prime appears only once, so the exponents are all 1. Using the formula: number of factors = (1+1) × (1+1) × (1+1) = 2 × 2 × 2 = 8.Thus, 105 has 8 factors.Answer:D. 8