LCM for 3, 4 and 9

"Least Common Multiple of 3 Numbers" Calculator
Least Common Multiple of
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What's the Least Common Multiple (LCM) of 3, 4 and 9?

Answer

LCM of 3, 4 and 9 is
36

First common multiples: 36, 72, 108, …

36 is divisible by all three: 36 ÷ 3 = 12, 36 ÷ 4 = 9, 36 ÷ 9 = 4 — and 12, 9 and 4 have no factor but 1 common to all of them, so no smaller number is. As a common denominator: multiply the top and bottom of x/3 by 12 and of y/4 by 9 and of z/9 by 4.

3 — prime

4 = 22

9 = 32

Prime349Highest power
2—22—22
33—3232

— = power 0: the prime is not a factor of this number; the LCM takes it from the number that has it.

LCM = 22 × 32 = 36

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LCM Table

1st2nd3rdLCM
13412
23412
33412
34412
34560
34612
34784
34824
34936
341060
3411132
341212
3413156
341484
341560
341648
3417204
341836
3419228
342060
342184
3422132
3423276
342424
3425300
3426156
3427108
342884
3429348
343060

FAQ

What's the Least Common Multiple (LCM) of 3, 4 and 9?

LCM of 3, 4 and 9 is 36

How to find the LCM of 3, 4 and 9 by prime factorization?

Take every prime that appears in 3, 4 and 9 to the highest power it reaches in any one of them and multiply: 2² × 3² = 36.

Can you get the LCM of 3, 4 and 9 two numbers at a time?

Yes. The LCM of 3 and 4 is 12, and the LCM of 12 and 9 is 36 — the same answer, because the least common multiple is associative and does not depend on the order of the three numbers.

Is 36 divisible by 3, 4 and 9?

Yes, and by definition it is the smallest positive integer that is: 36 ÷ 3, 36 ÷ 4 and 36 ÷ 9 all come out whole. Any other common multiple of 3, 4 and 9 is a multiple of 36.

See Also