LCM for 21 and 49
"Least Common Multiple" Calculator
What's the Least Common Multiple (LCM) of 21 and 49?
Answer
LCM of 21 and 49 is
147
First common multiples: 147, 294, 441, …
147 is divisible by both: 147 ÷ 21 = 7, 147 ÷ 49 = 3 — and 7 and 3 share no factor but 1, so no smaller number is. As a common denominator: multiply the top and bottom of x/21 by 7 and of y/49 by 3.
21 = 3 × 7
49 = 72
| Prime | 21 | 49 | Highest power |
|---|---|---|---|
| 3 | 3 | — | 3 |
| 7 | 7 | 72 | 72 |
— = power 0: the prime is not a factor of this number; the LCM takes it from the number that has it.
LCM = 3 × 72 = 147
More with these numbers
Found an error in the calculation or the information?
Related Calculations
See Also
- Greatest Common Factor - Find the Greatest Common Factor (GCF) of two numbers
- Least Common Multiple of 3 Numbers - Find the Least Common Multiple (LCM) of three numbers
- Greatest Common Factor of 3 Numbers - Find the Greatest Common Factor (GCF) of three numbers
- Multiples of a Number - List the first 10 multiples of any number from 1 to 999
Share This Calculation
Print
<a href="https://calculat.io/en/number/least-common-multiple-lcm-of/21--49">What is the LCM of 21 and 49? - Calculatio</a>Facebook
Twitter
Telegram
WhatsApp
Viber
Email
