Because the numbers are coprime (easily confirmed by the fact they are both prime, although only one was necessary) their LCM is their product; 3 x 13 = 39.
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LCM of 13 and 3 = 39Prime factorization of:13 = 133 = .........3========LCM=13 * 3 = 39
The LCM is: 195
factorization: 78=2*3*13 65=5*13 LCM=2*3*5*13=390
The LCM of 2, 3 and 13 is 78.The LCM of 2, 3 and 13 is 78.
lcm(13, 39, 91) = 273 Using prime factorization: 13 = 13 39 = 3 x 13 91 = 7 x 13 lcm = 3 x 7 x 13 = 273