HP 39gII User Manual page 178

ifactor
ifactors
igcd
iquo
iquorem
irem
168
Prime factorization. Returns the prime factorization of the
integer a as a product.
ifactor(a)
Example:
ifactor(150) returns
Prime factors. Similar to ifactor, but returns a list of the
factors of the integer a with their multiplicities.
ifactor(a)
Example:
ifactor(150) returns [2,1,3,1,5,2].
Greatest common divisor. Returns the integer that is the
greatest common divisor of the integers a and b.
igcd(a, b)
Example:
igcd(24, 36) returns 12.
Euclidean quotient. Returns the integer quotient when the
integer a is divided by the integer b.
iquo(a, b)
Example:
iquo(46, 21) returns 2.
Euclidean quotient and remainder. Returns the integer
quotient and remainder when the integer a is divided by
the integer b.
iquorem(a, b)
Example:
iquorem(46, 21) returns [2, 4].
Euclidean remainder. Returns the integer remainder when
the integer a is divided by the integer b.
irem(a, b)
Example:
irem(46, 21) returns 4.
2
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2 3 5
Using mathematical functions