LCM for 45 and 105

What's the Least Common Multiple (LCM) of 45 and 105?

Answer: LCM of 45 and 105 is 315

(Three hundred fifteen)

Finding LCM for 45 and 105 using GCF's of these numbers

The first method to find LCM for numbers 45 and 105 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 45 and 105 is 15, so

LCM = (45 × 105) ÷ 15

LCM = 4725 ÷ 15

LCM = 315

Finding LCM for 45 and 105 by Listing Multiples

The second method to find LCM for numbers 45 and 105 is to list out the common multiples for both nubmers and pick the first which matching:

Multiples of 45: 45, 90, 135, 180, 225, 270, 315, 360, 405

Multiples of 105: 105, 210, 315, 420, 525

So the LCM for 45 and 105 is 315

Finding LCM for 45 and 105 by Prime Factorization

Another method to find LCM for numbers 45 and 105 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors:

All Prime Factors of 45: 3, 3, 5 (exponent form: 32, 51)

All Prime Factors of 105: 3, 5, 7 (exponent form: 31, 51, 71)

32 × 51 × 71 = 315

Related Calculations

See Also

LCM Table

Number 1Number 2LCM
30105210
311053255
321053360
331051155
341053570
35105
361051260
371053885
381053990
391051365
40105840
411054305
42105
431054515
441054620
45105
461054830
471054935
481051680
49105735
501051050
511051785
521055460
531055565
541051890
551051155
56105840
571051995
581056090
591056195

About "Least Common Multiple" Calculator

This calculator will help you find the Least Common Multiple (LCM) of two numbers. For example, it can help you find out what's the Least Common Multiple (LCM) of 45 and 105? (The answer is: 315). Select the first number (e.g. '45') and the second number (e.g. '105'). After that hit the 'Calculate' button.
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

FAQ

What's the Least Common Multiple (LCM) of 45 and 105?

LCM of 45 and 105 is 315