Here's the factor tree:
180
=90x2
=45x2x2
=15x3x2x2
=5x3x3x2x2
or 2 x 2 x 3 x 3 x 5
(In index form this is 22 x 32 x 5)
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Multiply prime numbers or prime factors to find their product.
To work out the prime factors of 180 in index form, you first need to find the prime factors of 180. Start by dividing 180 by the smallest prime number, which is 2. Continue dividing by prime numbers until you cannot divide any further. The prime factors of 180 are 2, 2, 3, 3, and 5. In index form, this would be written as 2^2 * 3^2 * 5.
21 as a product of its prime factors is 1 X 3 X 7.
As a product of its prime factors: 5*5*5*11 = 1375
As a product of its prime factors: 2*5*5*5 = 250