Find the prime factorization of each of the following number

Find the prime factorization of each of the following numbers, then find their gcd and 1cm. 68 and 83 192 and 224 507 and 1287 168,210,and 252

Solution

A)

68=4*17

83 is prime

So

gcd(68,83)=1

lcm=68*83

B)

192=64*3

224=32*7

gcd=32

lcm=64*3*7

C)

507=3*13^2

1287=9*11*13

gcd=3*13

lcm=9*11*13^2

D)

168=7*3*8

210=3*7*2*5

252=4*7*9

gcd=7*3*2

lcm=7*9*8*5