3 x 23 The prime factors of 69 are 3 and 23.
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69 = 3 x 23
3 x 23 = 69
Since the numerator of the fraction is prime, and not a prime factor of the denominator, the proper fraction 13/69 is already expressed in its simplest form.
It's not necessary. Since 69 is a factor of 207, it is automatically the GCF. But if you insist... 69 3,23 207 3,69 3,3,23 Select the common factors. 3 x 23 = 69, the GCF.
There can only be one LEAST Common Multiple. Since the three numbers are co-prime, their LCM is the same as their product, that is, LCM(4, 37, 69) = 4 * 37 * 69 = 10,212 [Two numbers are co-prime if they have no factor in common. The numbers, themselves, need not be prime.]