A180327 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A180327

The non-common part of the larger number of an amicable pair.

71, 605, 731, 1391, 796, 1357, 139, 1151, 827, 4187, 527, 107, 8873, 2759, 239, 7697, 19147, 16873, 11021, 11303, 25429, 4601, 91271, 97481, 30743, 49949, 28459, 4961, 32171, 899, 83711, 85759, 86407, 89027, 81583, 195889, 99587, 8227, 56339, 122623

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Very few duplicates occur: for the amicable numbers less than 10^14, a number appears at most twice.

LINKS

T. D. Noe, Table of n, a(n) for n=1..10000

FORMULA

a(n) = A002046(n) / gcd(A002025(n),A002046(n)) = A002046(n) / A061469(n).

CROSSREFS

Cf. A180326 (non-common part of the smaller number of an amicable pair)

Sequence in context: A209953 A251390 A251383 * A201039 A142674 A112750

Adjacent sequences: A180324 A180325 A180326 * A180328 A180329 A180330

KEYWORD

nonn

AUTHOR

T. D. Noe, Sep 07 2010

STATUS

approved