HP 40gs 229

hp40g+.book Page 47 Friday, December 9, 2005 1:03 AM

DIVIS	Gives the divisors of an integer.
	Gives the divisors of an integer.
	Example
	Typing:
	DIVIS(12)
	gives:
	12 OR 6 OR 3 OR 4 OR 2 OR 1
	Note: DIVIS(0) returns 0 OR 1.
EULER	Returns the Euler index of a whole number. The Euler
	Returns the Euler index of a whole number. The Euler
	index of n is the number of whole numbers less than n that
	are prime with n.
	Example
	Typing:
	EULER(21)
	gives:
	12
	Explanation: {2,4,5,7,8,10,11,13,15,16,17,19} is
	the set of whole numbers less than 21 and prime with 21.
	There are 12 members of the set, so the Euler index is12.
FACTOR	Decomposes an integer into its prime factors.
	Example
	Typing:
	FACTOR(90)
	gives:
	2·32·5
GCD	Returns the greatest common divisor of two integers.
	Returns the greatest common divisor of two integers.
	Example
	Typing:
	GCD(18, 15)
	gives:
	3