Answer
$2^{3}\times5\times7$
Work Step by Step
In order to find the prime factorization by 280, we can try to divide 81 by the first prime number, 2.
$280\div2=140$
Try to divide 140 by 2.
$140\div2=70$
Try to divide 70 by 2.
$70\div2=35$
35 is not divisible by 2 or 3, so we can divide by the next prime, 5.
$35\div5=7$
The number 7 itself is a prime number. Therefore, the prime factorization of 280 is $2\times2\times2\times5\times7=2^{3}\times5\times7$.
