The greatest common divisor of two natural numbers is 6 and the least common multiple is 540
540×6=3240
3240=2×2×2×3×3×3×3×5
=72×45
=54×60
=81×40
=36×90
The two natural numbers are 72 and 45, 54 and 60, 81 and 40, or 36 and 90
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