There is a natural number whose single digit is zero. It has eight divisors. What is the minimum number?

According to the analysis, because 8 = 7 + 1 = (1 + 1) × (3 + 1) = (1 + 1) × (1 + 1) × (1 + 1), and because this natural number must contain two different prime factors, 2 and 5, and the minimum requirement, 8 can only be written as: (1 + 1) × (1 + 1) × (1 + 1); therefore, this natural number should be: 2 × 3 × 5 = 30; answer: the minimum natural number with zero digits and eight divisors is 30

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