The product of two co-prime numbers is 221. Then their LCM is =?

Question: The product of two co-prime numbers is 221. Then their LCM is =?Solution: HCF of co-prime number is always 1∴ Let number are = x & y respectivelyProduct of number = xyxy = 221 (given)∴ Product of number = LCM × HCF⇒ LCM × 1 = 221⇒ LCM = 221