All composite numbers can be expressed as unique products of prime numbers. This is accomplished by dividing the original number and its factors by prime numbers until all the factors are prime. A factor tree can help you visualize this.
Example: 210
210 Divide by two.
105,2 Divide by three.
35,3,2 Divide by five.
7,5,3,2 Stop. All the factors are prime.
2 x 3 x 5 x 7 = 210
That's the prime factorization of 210.
295 = 5 × 59
3 x 5 = 15
I think you mean that the prime factorization is 2 times 3 times 5. To solve, just perform the multiplication: 2x3x5=30
280 140,2 70,2,2 35,2,2,2 7,5,2,2,2
The prime factorization of 212 is 2 x 2 x 53. 16 is not a factor of 212.
As a product of its prime factors: 3*3*3*5*7 = 945
2 x 2 x 5 x 11
Prime factors of 38: 2 and 19 so Divide by 2 you get 19. Ans: 2x19
21 3,7 3 x 7 = 21
No, 3x5x4 is not a prime factorization of 60. A prime factorization of 60 would consist of only prime numbers. The prime factorization of 60 is 2x2x3x5.
When all the factors are prime numbers, that's a prime factorization.
Prime Factorization of 22The prime factorization of 22 is:2 X 11Both numbers are prime, so 2 X 11 is the prime factorization of 22.