Two integers
and
are
-multiamicable
if
and
where
is the divisor function and
are positive integers.
If
,
is an amicable pair.
cannot have just one distinct prime factor,
and if it has precisely two distinct prime factors,
then
and
is even. Small multiamicable numbers for small
are given by Cohen et al.
(1995). Several of these numbers are reproduced in the table below.
1 | 6 | 76455288 | 183102192 |
1 | 7 | 52920 | 152280 |
1 | 7 | 16225560 | 40580280 |
1 | 7 | 90863136 | 227249568 |
1 | 7 | 16225560 | 40580280 |
1 | 7 | 70821324288 | 177124806144 |
1 | 7 | 199615613902848 | 499240550375424 |