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The LCM is 441.
For 147, 63, 21 the LCM is: 441
The Least Common Multiple (LCM) for 147 63 is 441.
3969
lcm(49, 63, 21) = 441 49 = 7^2 63 = 3^2 x 7 21 = 3 x 7 lcm = 3^2 x 7^2 = 441