22 x 3 x 5 x 7 = 420
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420 = 2 * 2 * 3 * 5 * 7
It is: 2*2*3*5*7 = 420 or as 22*3*5*7 = 420
Least Common Multiple (LCM) for 42 140 is 420.
Find one factor, divide by it to get the other factor. Continue separating each of the factors into smaller factors, until you only have prime numbers. For example, 840 = 2 x 420. Now continue finding smaller factors for 420.
420 has 5 prime factors, four of which are different prime numbers. Prime factors of 420 are 2 x 2 x 5 x 3 x 7.