Decompose the natural numbers a and b into prime factors to get a=2*5*7*m, b=3*5*m, if the least common multiple of a and b is 2730, then m=what.
把自然数a和b分解质因数得到a=2*5*7*m，b=3*5*m，如果a和b的最小公倍数是2730，那么m=多少．
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