LCM for 5 and 31
What's the Least Common Multiple (LCM) of 5 and 31?
(One hundred fifty-five)
Finding LCM for 5 and 31 using GCF's of these numbers
The first method to find LCM for numbers 5 and 31 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:
LCM = (Number1 × Number2) ÷ GCF
GCF of numbers 5 and 31 is 1, so
LCM = (5 × 31) ÷ 1
LCM = 155 ÷ 1
LCM = 155
Finding LCM for 5 and 31 by Listing Multiples
The second method to find LCM for numbers 5 and 31 is to list out the common multiples for both nubmers and pick the first which matching:
Multiples of 5: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 155, 160, 165
Multiples of 31: 31, 62, 93, 124, 155, 186, 217
So the LCM for 5 and 31 is 155
Finding LCM for 5 and 31 by Prime Factorization
Another method to find LCM for numbers 5 and 31 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors:
All Prime Factors of 5: 5 (exponent form: 51)
All Prime Factors of 31: 31 (exponent form: 311)
51 × 311 = 155
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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