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**xWhiteyx** so 1, and all the factors of p go into p. So with 3^3, it's every 3rd, with 5^3, It's every 5th and so on. But I need to obtain an expression for that, and frankly, that just isn't coming into my head right now- and I'm still on the easy questions. ;http://mathhelpforum.com/advanced-math-topics/123151-eulers-phi-function.html#post436592\" rel=\"nofollow\">

so 1, and all the factors of p go into p. So with 3^3, it's every 3rd, with 5^3, It's every 5th and so on. But I need to obtain an expression for that, and frankly, that just isn't coming into my head right now- and I'm still on the easy questions. ;(