LCM for 70 and 80
What's the Least Common Multiple (LCM) of 70 and 80?
(Five hundred sixty)
Finding LCM for 70 and 80 using GCF's of these numbers
The first method to find LCM for numbers 70 and 80 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:
LCM = (Number1 × Number2) ÷ GCF
GCF of numbers 70 and 80 is 10, so
LCM = (70 × 80) ÷ 10
LCM = 5600 ÷ 10
LCM = 560
Finding LCM for 70 and 80 by Listing Multiples
The second method to find LCM for numbers 70 and 80 is to list out the common multiples for both nubmers and pick the first which matching:
Multiples of 70: 70, 140, 210, 280, 350, 420, 490, 560, 630, 700
Multiples of 80: 80, 160, 240, 320, 400, 480, 560, 640, 720
So the LCM for 70 and 80 is 560
Finding LCM for 70 and 80 by Prime Factorization
Another method to find LCM for numbers 70 and 80 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors:
All Prime Factors of 70: 2, 5, 7 (exponent form: 21, 51, 71)
All Prime Factors of 80: 2, 2, 2, 2, 5 (exponent form: 24, 51)
24 × 51 × 71 = 560
Related Calculations
See Also
- Greatest Common Factor - Find the Greatest Common Factor (GCF) of two numbers
<a href="https://calculat.io/en/number/least-common-multiple-lcm-of/70--80">What is the LCM of 70 and 80? - Calculatio</a>
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