Starting with 180, divide it by the lowest prime number 2 , repeat until it cannot be divided by 2 and move on to next prime number 3 and so on. When the remainder is 1 stop-we have obtained our prime factors.
∙ 180 ÷ 2 = 90
∙ 90 ÷ 2
= 45 which cannot be divided by 2 → 3
∙ 45 ÷ 3 = 15
∙ 15 ÷ 3
= 5 which cannot be divided by 3 → 5
∙ 5÷5
= 1 having reached 1, we are there
⇒180 = 2 × 2 × 3 × 3 × 5
= 2² × 3² × 5
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Starting with 180, divide it by the lowest prime number 2 , repeat until it cannot be divided by 2 and move on to next prime number 3 and so on. When the remainder is 1 stop-we have obtained our prime factors.
∙ 180 ÷ 2 = 90
∙ 90 ÷ 2
= 45 which cannot be divided by 2 → 3
∙ 45 ÷ 3 = 15
∙ 15 ÷ 3
= 5 which cannot be divided by 3 → 5
∙ 5÷5
= 1 having reached 1, we are there
⇒180 = 2 × 2 × 3 × 3 × 5
= 2² × 3² × 5