Work Step by Step
In order to find the prime factorization of 70, we can try to divide 70 by the first prime, 2. $70\div2=35$ 35 cannot be divided by 2 or 3, so we divide by the next prime, 5. $35\div5=7$ 7 itself is a prime number, so we cannot simplify any more. The prime factorization of 70 is $2\times5\times7$.