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prime factors(20points)
發問:
plz help me to find all the prime factors of 36.Thx!
最佳解答:
36 = 2^2 x 3^2 Therefore the prime factory for 36 are 2 and 3. Depending on definition, 1 may or may not be included. 2009-07-01 17:34:39 補充： Until the 19th century, most mathematicians considered the number 1 a prime. 2009-07-01 19:25:05 補充： Nowadays, most people does not consider 1 as prime. But for the sake of interest, it's worth mentioning that even some mathematicians consider 1 as prime. Reference: http://en.wikipedia.org/wiki/Prime_number
其他解答:
It is because36=2*2*3*3 So, the required answers are 2&3. Some people may think 1 is also included, buy it is totally wrong since 1 doesn't not belong to prime number and composite number.
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