|
Search: id:A138570
|
|
|
| A138570 |
|
Numbers that set records for the number that multiplying by will double the number of divisors. |
|
+0
2
|
| |
|
|
OFFSET
|
1,2
|
|
|
COMMENT
|
A number is in this sequence exactly once if and only if it is in A135060 at least once.
|
|
EXAMPLE
|
840 qualifies for this sequence because 840 sets a new record (9) for the number that multiplying will double the divisors (840 has 32 divisors; smallest number with 64 divisors is 840*9=7560)
|
|
CROSSREFS
|
Cf. A135060.
Adjacent sequences: A138567 A138568 A138569 this_sequence A138571 A138572 A138573
Sequence in context: A072486 A096123 A081125 this_sequence A139315 A014767 A002319
|
|
KEYWORD
|
more,nonn,uned
|
|
AUTHOR
|
J. Lowell (jhbubby(AT)mindspring.com), May 12 2008
|
|
|
Search completed in 0.002 seconds
|
