If a. b The greatest common factor of two natural numbers is 22, and their prime factors are a=2*M*17, b=2*3*M*19, then M=how many.
如果a．b两个自然数的最大公因数是22，把它们分解质因数分别是a=2*M*17，b=2*3*M*19，那么M=多少．
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