2x2x3x3x7=252
19 and 19
3, 7 and 11
38
As a product of its prime factors: 2*3*7 = 42
They are: 1 times 107 = 107 which is also a prime number
-42
No. Prime factors are the numbers that make up other numbers, but they have to be prime. Prime factorisation is the process of finding the prime numbers that create a number. This is when you multiply the prime numbers together and the product is the original number. For example: 20 5x4 5x2x2 This process is called prime factorisation. In this case, the prime numbers are 2, 2, and 5.
168 = 2 * 2 * 2 * 3 * 7
-38
They are only: 1 times 2003 = 2003 because it is a prime number
31+5+2=29+7+2=23+13+2=19+17+2=38