196 = 2 * 2 * 7 * 7
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196 = 22 x 72
To find the prime factorization, start with any factor pair of 196 and keep facoring until all factors are prime. 196 2 x 98 2 x 2 x 49 2 x 2 x 7 x 7 To write it in exponential form write the 2 and 7 with exponents: 22 x 72 = 196
When all the factors are prime numbers, that's a prime factorization.
a prime factorization tree
397 is a prime number, therefore prime factorization of 397 = 397.