LCM for 21 and 23

"Least Common Multiple" Calculator

Least Common Multiple of

and

What's the Least Common Multiple (LCM) of 21 and 23?

Answer: LCM of 21 and 23 is 483

(Four hundred eighty-three)

Finding LCM for 21 and 23 using GCF's of these numbers

The first method to find LCM for numbers 21 and 23 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 21 and 23 is 1, so

LCM = (21 × 23) ÷ 1

LCM = 483 ÷ 1

LCM = 483

Finding LCM for 21 and 23 by Listing Multiples

The second method to find LCM for numbers 21 and 23 is to list out the common multiples for both nubmers and pick the first which matching:

Multiples of 21: 21, 42, 63, 84, 105, 126, 147, 168, 189, 210, 231, 252, 273, 294, 315, 336, 357, 378, 399, 420, 441, 462, 483, 504, 525

Multiples of 23: 23, 46, 69, 92, 115, 138, 161, 184, 207, 230, 253, 276, 299, 322, 345, 368, 391, 414, 437, 460, 483, 506, 529

So the LCM for 21 and 23 is 483

Finding LCM for 21 and 23 by Prime Factorization

Another method to find LCM for numbers 21 and 23 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors:

All Prime Factors of 21: 3, 7 (exponent form: 31, 71)

All Prime Factors of 23: 23 (exponent form: 231)

31 × 71 × 231 = 483

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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 21 and 23? (The answer is: 483). Select the first number (e.g. '21') and the second number (e.g. '23'). 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

"Least Common Multiple" Calculator

Least Common Multiple of

and

LCM Table

Number 1Number 2LCM
623138
723161
823184
923207
1023230
1123253
1223276
1323299
1423322
1523345
1623368
1723391
1823414
1923437
2023460
2123483
2223506
232323
2423552
2523575
2623598
2723621
2823644
2923667
3023690
3123713
3223736
3323759
3423782
3523805

FAQ

What's the Least Common Multiple (LCM) of 21 and 23?

LCM of 21 and 23 is 483

See Also