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Maximum number of unique prime factors | Return maximum number of prime factors for any number in [ 1 , N ].
Based on Sieve of Eratosthenes.
If p is prime.
We simply multiply first set of prime numbers while the product is smaller than N ..
Driver Code"
Solution in Python:

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Write me a code to maximum number of unique prime factors and the other steps required?
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#Here is code to maximum number of unique prime factors and the other steps required.
 def maxPrimefactorNum ( N ) :
	if ( N < 2 ) :
		return 0 ;
	arr = [ True ] * ( N + 1 ) ;
	prod = 1 ;
	res = 0 ;
	p = 2 ;
	while ( p * p <= N ) :
		if ( arr [ p ] == True ) :
			for i in range ( p * 2 , N + 1 , p ) :
				arr [ i ] = False ;
			prod *= p ;
			if ( prod > N ) :
				return res ;
			res += 1 ;
		p += 1 ;
	return res ;
N = 500 ;
print ( maxPrimefactorNum ( N ) ) ;