LCM for 11 and 21

"Least Common Multiple" Calculator

What's the Least Common Multiple (LCM) of 11 and 21?

Answer

LCM of 11 and 21 is

231

First common multiples: 231, 462, 693, …

231 is divisible by both: 231 ÷ 11 = 21, 231 ÷ 21 = 11 — and 21 and 11 share no factor but 1, so no smaller number is. As a common denominator: multiply the top and bottom of x/11 by 21 and of y/21 by 11.

11 and 21 are coprime (GCF = 1), so their LCM is simply the product: 11 × 21 = 231.

11 — prime

21 = 3 × 7

Prime	11	21	Highest power
3	—	3	3
7	—	7	7
11	11	—	11

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

LCM = 3 × 7 × 11 = 231

More with these numbers

Related Calculations

LCM Table

Number 1	Number 2	LCM
11	7	77
11	12	132
11	13	143
11	14	154
11	15	165
11	16	176
11	17	187
11	20	220
11	21	231
11	22	22
11	23	253
11	24	264
11	25	275
11	26	286
11	27	297
11	31	341
11	32	352
11	33	33
11	34	374
11	35	385
11	37	407
11	39	429
11	41	451
11	42	462
11	43	473
11	44	44
11	45	495
11	47	517
11	49	539
11	50	550

FAQ

What's the Least Common Multiple (LCM) of 11 and 21?

LCM of 11 and 21 is 231

How to find the LCM of 11 and 21 using prime factorization?

To find the LCM of 11 and 21, find all prime factors of both numbers, then multiply the highest power of each prime factor. The result is 231.

What is the difference between LCM and GCF?

LCM (Least Common Multiple) is the smallest number divisible by both numbers, while GCF (Greatest Common Factor) is the largest number that divides both. For 11 and 21: LCM = 231, GCF = 1.

LCM for 11 and 21

What's the Least Common Multiple (LCM) of 11 and 21?

More with these numbers

Related Calculations

See Also

LCM Table

FAQ

What's the Least Common Multiple (LCM) of 11 and 21?

How to find the LCM of 11 and 21 using prime factorization?

What is the difference between LCM and GCF?

See Also

Number 1	Number 2	LCM
11	7	77
11	12	132
11	13	143
11	14	154
11	15	165
11	16	176
11	17	187
11	20	220
11	21	231
11	22	22
11	23	253
11	24	264
11	25	275
11	26	286
11	27	297
11	31	341
11	32	352
11	33	33
11	34	374
11	35	385
11	37	407
11	39	429
11	41	451
11	42	462
11	43	473
11	44	44
11	45	495
11	47	517
11	49	539
11	50	550

Number 1	Number 2	LCM
11	7	77
11	12	132
11	13	143
11	14	154
11	15	165
11	16	176
11	17	187
11	20	220
11	21	231
11	22	22
11	23	253
11	24	264
11	25	275
11	26	286
11	27	297
11	31	341
11	32	352
11	33	33
11	34	374
11	35	385
11	37	407
11	39	429
11	41	451
11	42	462
11	43	473
11	44	44
11	45	495
11	47	517
11	49	539
11	50	550

Number 1	Number 2	LCM
11	7	77
11	12	132
11	13	143
11	14	154
11	15	165
11	16	176
11	17	187
11	20	220
11	21	231
11	22	22
11	23	253
11	24	264
11	25	275
11	26	286
11	27	297
11	31	341
11	32	352
11	33	33
11	34	374
11	35	385
11	37	407
11	39	429
11	41	451
11	42	462
11	43	473
11	44	44
11	45	495
11	47	517
11	49	539
11	50	550