Factors, GCF and LCM Worksheet Generator
Mix and match factor lists, prime factorization, greatest common factor and least common multiple on one printable sheet — with a full answer key.
Factors, GCF & LCM
- 1.LCM of 21 and 31:
- 2.LCM of 33 and 23:
- 3.GCF of 47 and 60:
- 4.LCM of 30 and 57:
- 5.LCM of 59 and 39:
- 6.GCF of 30 and 21:
- 7.LCM of 53 and 40:
- 8.LCM of 48 and 41:
- 9.GCF of 8 and 22:
- 10.GCF of 46 and 9:
- 11.GCF of 7 and 39:
- 12.LCM of 23 and 16:
- 13.GCF of 42 and 50:
- 14.GCF of 38 and 44:
- 15.LCM of 6 and 36:
- 16.LCM of 37 and 51:
- 17.GCF of 18 and 19:
- 18.LCM of 44 and 21:
Factors, GCF & LCM — Answer Key
- 1.LCM of 21 and 31:651
- 2.LCM of 33 and 23:759
- 3.GCF of 47 and 60:1
- 4.LCM of 30 and 57:570
- 5.LCM of 59 and 39:2301
- 6.GCF of 30 and 21:3
- 7.LCM of 53 and 40:2120
- 8.LCM of 48 and 41:1968
- 9.GCF of 8 and 22:2
- 10.GCF of 46 and 9:1
- 11.GCF of 7 and 39:1
- 12.LCM of 23 and 16:368
- 13.GCF of 42 and 50:2
- 14.GCF of 38 and 44:2
- 15.LCM of 6 and 36:36
- 16.LCM of 37 and 51:1887
- 17.GCF of 18 and 19:1
- 18.LCM of 44 and 21:924
At a glance
The factors gcf lcm worksheet generator makes a fresh printable practice sheet in seconds. Factor lists, prime factorization, greatest common factor and LCM. Every time you change a setting, the page rebuilds instantly, so you can print a different sheet for every group or lesson. It is designed for clean printing on US Letter or A4 paper with half-inch margins.
What the factors gcf lcm worksheet generator does
Each time you open the factors gcf lcm worksheet generator it draws a brand new set of problems, which means you can print a different sheet for every group.
Set the difficulty, how many problems you want and how many columns they sit in. The preview updates as you change each setting, so the page you see is exactly the page that prints.
Leave the answer key switched on and it prints on its own sheet behind the worksheet, matched problem for problem. Everything fits inside a standard half-inch margin, and you can switch between US Letter and A4 before printing.
When to use a factors gcf lcm worksheet
Factor lists, prime factorization, greatest common factor and LCM. Because the problems regenerate, the same factors gcf lcm worksheet generator covers a warm-up on Monday, a homework sheet on Wednesday and a quick check on Friday without any of them repeating.
A short page of eight to twelve problems works well as a lesson opener, while a full page suits independent practice, homework or a review folder. At home, printing the same settings twice lets you work one copy together and leave the second for solo practice.
Common mistakes on factors gcf lcm problems
Remind students to do the same thing to both sides and to show each step; skipping steps is what turns a small slip into a wrong answer.
When accuracy is high but the page takes a long time, keep the difficulty and shorten the sheet; fluency comes from frequent short practice rather than from longer worksheets.
Created by Tim van de Vall
B.S. in Computational Media, Georgia Institute of Technology. Each factors gcf lcm worksheet generator is designed for clean printing on US Letter and A4 paper.
Updated 2026-08-14About the authorEditorial policy
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Factors gcf lcm worksheet generator FAQ
- How is prime factorization written?
- As a product of primes in ascending order, for example 60 = 2 × 2 × 3 × 5.
- Can I focus on just GCF?
- Yes — untick the other problem types and the whole sheet will be greatest common factor practice.
