1.9, 5.6, 7.8
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You need at least two numbers to find a GCF.
LCM(120, 56, 78) = 10920.
Greatest common factor of 78 and 286 is 26.
The Greatest Common Factor (GCF) is: 7
Prime factors of 56 are 23 x 7Prime factors of 78 are 2 x 3 x 13The LCM is the product of all the primes to their greatest power,so the LCM of 56 and 78 is 23 x 3 x 7 x 13 = 8 x 273 = 2,184