how to factor integers

Question

im doing factoring integers and im confused about i dont knowhow to do it how you write  a number as a product of prime numbers how do you do it  how to compose a number number  how do you find the gcf? how do you determin whether number are relatively prime  and how to write it each number as a number and how to determin whether each  pair  of numbers is relativelay prime and not find gcf can you do example  18 and 90 ps im home schooled

Answer 1

1. basik idea is yukan divide 1 integer intu other integer

if result is exact...if leftover=0, then the bottom number is a fakter av the top number

2. tu fakter a number is: tri all possabel smaller numbers tu find all that R fakters

   divide bi 2, 3, 4...up tu (top number)/2

3. prime number...no fakters (yu dont divide bi 1, start with 2)

4. prime fakters: wen yu divide, oenlee divide bi prime numbers

"gratest fakter"=biggest number in yer list av fakters

5. kommon fakters...du this tu 2 numbers & then thro awae NE number

that is NOT a fakter av both top numbers