Use a factor tree.
104
52,2
26,2,2
13,2,2,2
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You find the smallest prime that divides 104, which is 2, so 104=2*52. You keep repeating this until you get all primes. 104=2*52=2*2*26=2*2*2*13 is the prime factorization.
The prime factors of 104 are 2x2x2x13.
2*2*2*13 = 104
The prime factorization of 104 is 2 x 2 x 2 x 13.The prime factorization of 104 is 2 to the third power times 13.2 * 2 * 2 * 132 x 2 x 2 x 13 = 104
The prime factors of a squared number are the prime factors, if any, of its square root.
The prime factors of 87 are 3 x 29