LCM for 2 and 18
What's the Least Common Multiple (LCM) of 2 and 18?
(Eighteen)
Finding LCM for 2 and 18 using GCF's of these numbers
The first method to find LCM for numbers 2 and 18 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:
LCM = (Number1 × Number2) ÷ GCF
GCF of numbers 2 and 18 is 2, so
LCM = (2 × 18) ÷ 2
LCM = 36 ÷ 2
LCM = 18
Finding LCM for 2 and 18 by Listing Multiples
The second method to find LCM for numbers 2 and 18 is to list out the common multiples for both nubmers and pick the first which matching:
Multiples of 2: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22
Multiples of 18: 18, 36, 54, 72, 90, 108, 126, 144, 162, 180, 198, [...], 18
So the LCM for 2 and 18 is 18
Finding LCM for 2 and 18 by Prime Factorization
Another method to find LCM for numbers 2 and 18 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors:
All Prime Factors of 2: 2 (exponent form: 21)
All Prime Factors of 18: 2, 3, 3 (exponent form: 21, 32)
21 × 32 = 18
Related Calculations
LCM Table
About "Least Common Multiple" Calculator
Least Common Multiple (LCM) also known as the Lowest Common Multiple or Smallest Common Multiple of 2 numbers - it is the smallest positive integer that is divisible by both numbers