357 = 3 x 7 x 17
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357 is not a prime number. Its positive integer factors are: 1, 3, 7, 17, 21, 51, 119, 357
composite 3 and 119 7 and 51 17 and 21
Prime factors: 3, 7, 17 Others are combinations of the primes, i.e. 2 x 7 = 21 3 x 17 = 51 7 x 17 = 119
357 = 3*7*17
Yes, 357 is a composite number. Its prime factorisation is 3 x 7 x 17.