Answer :

Find the factor string of 840 given number.
=> to get the factor string of 840, all you need to do is find the prime factors of 840.
Here are some of the factors of 840.
=> 23 x 3 x 5 x 7 , this is equals to 840
=> 4 x 210 , this is also equals to 840
=> 22 x 21 x 10, Is also equals to 840
=> 22 x 7 x 3 x 5 x 2 , Is also equals to 840
=> 7 x 120 = 840
=> 84 x 2 x 5 = 840