471 is the sum of some consecutive prime numbers. One of my readers has listed those primes in the comments.

Print the puzzles or type the solution on this excel file:  12 Factors 2015-04-20

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• 471 is a composite number.
• Prime factorization: 471 = 3 x 157
• The exponents in the prime factorization are 1 and 1. Adding one to each and multiplying we get (1 + 1)(1 + 1) = 2 x 2 = 4. Therefore 471 has exactly 4 factors.
• Factors of 471: 1, 3, 157, 471
• Factor pairs: 471 = 1 x 471 or 3 x 471
• 471 has no square factors that allow its square root to be simplified. √471 ≈ 21.70253

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