Pow 7 Factors

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Extended Problem #1
Search for numbers having exactly 7 factors.
Numbers having exactly 7 factors are numbers that are perfect squares; perfect squares are the squares of whole numbers that have an odd number of factors. Furthermore, the square of a number is that number times itself. Perfect squares: 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169… Although the number 7 is a squared number, it also has 6 other factors. The number that’s being squared will have 3 factors on each side. Therefore by taking prime numbers into consideration, the perfect squares of a prime number will have 3 factors because prime numbers only have factors of 1 and themselves. So, the prime number will be raised to a certain power. When raising the squared …show more content…

For the 7 factors we can include the number 8 along with the numbers 1, 2, and 4. By using this method of multiplying the factors to get others, we get the perfect square 16 because we multiply out the factors 8 and 2. If we continue to use this method we find that the numbers are similar and result as perfect squares. By multiplying the factors we have, we are then able to find the numbers being squared. If we use the middle number which is 8 and multiply it by the factor 4 we get 32 which is also a number of the 7 factors, along with the numbers 1, 2, 4, 8, and 16. As we continue to find the other factors, we can determine that the middle number (which is 8) is a square; therefore 8 squared is 64 and 64 has 7 …show more content…

Using this method, we then looked at the prime number 3; the perfect square of 3 is 9.
Factors of 9: 1, 3, and 9.
However, since we are looking to find 7 factors we must determine the 4 other factors of the mystery number along with 1, 3, and 9. To find this number, we began by multiplying the factors together (1x3x9) which gave us 27; after finding 27, we came to the realization that 27 would be the middle number. We then multiplied the factors again (1x3x9x27), which is initially 27 multiplied by itself— yielding a perfect square (27x27).
As we continued to analyze these numbers further, we came to recognize that the numbers tripled. To explain further, the factors were increasing by 3; this allowed us to determine our next factor by multiplying our last factor, 27, by 3 which gives us 81.
1x3= 9, 9x3=27, 27x3= 81, 81x3= 243, 243x3= 729
Factors: 1, 3, 9, 27, 81, 243,

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