LCM for 40 and 57
What's the Least Common Multiple (LCM) of 40 and 57?
Answer
(Two thousand, two hundred eighty)
Finding LCM for 40 and 57 using GCF of these numbers
The first method to find LCM for numbers 40 and 57 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:
LCM = (Number1 × Number2) ÷ GCF
GCF of numbers 40 and 57 is 1, so
LCM = (40 × 57) ÷ 1
LCM = 2280 ÷ 1
LCM = 2280
Finding LCM for 40 and 57 by Listing Multiples
The second method to find LCM for numbers 40 and 57 is to list out the common multiples for both numbers and pick the first one that matches:
Multiples of 40: 40, 80, 120, 160, 200, 240, 280, 320, 360, 400, 440, 480, 520, 560, 600, 640, 680, 720, 760, 800, 840, 880, 920, 960, 1000, 1040, 1080, 1120, 1160, 1200, 1240, 1280, 1320, 1360, 1400, 1440, 1480, 1520, 1560, 1600, 1640, 1680, 1720, 1760, 1800, 1840, 1880, 1920, 1960, 2000, 2040, 2080, 2120, 2160, 2200, 2240, 2280, 2320, 2360
Multiples of 57: 57, 114, 171, 228, 285, 342, 399, 456, 513, 570, 627, 684, 741, 798, 855, 912, 969, 1026, 1083, 1140, 1197, 1254, 1311, 1368, 1425, 1482, 1539, 1596, 1653, 1710, 1767, 1824, 1881, 1938, 1995, 2052, 2109, 2166, 2223, 2280, 2337, 2394
So the LCM for 40 and 57 is 2280
Finding LCM for 40 and 57 by Prime Factorization
Another method to find LCM for numbers 40 and 57 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors:
All Prime Factors of 40: 2, 2, 2, 5 (exponent form: 23, 51)
All Prime Factors of 57: 3, 19 (exponent form: 31, 191)
23 × 51 × 31 × 191 = 2280
Related Calculations
See Also
- Greatest Common Factor - Find the Greatest Common Factor (GCF) of two numbers
<a href="https://calculat.io/en/number/least-common-multiple-lcm-of/40--57">What is the LCM of 40 and 57? - Calculatio</a>
LCM Table
About "Least Common Multiple" Calculator
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