A066871 Harshad (or Niven) amicable pairs: numbers which belong to an amicable pair in which both terms are Harshad (or Niven) numbers.

2620, 2924, 10634085, 14084763, 23389695, 25132545, 34256222, 35997346, 46521405, 53011395, 63560025, 65003175, 80422335, 82977345, 120812175, 126671985, 190888155, 194594085, 256948065, 263110815, 281499435, 297034965

Offset

1,1

Comments

In first 5000 amicable pairs, there are 192 Harshad amicable numbers.

Links

Amiram Eldar, Table of n, a(n) for n = 1..20000

Shyam Sunder Gupta, Amicable Numbers.

Example

a(1) = 2620 and a(2) = 2924, where a(1) and a(2) are Harshad numbers and also (2620, 2924) is an amicable pair.

Crossrefs

Cf. A063990, A005349.

Sequence in context: A257420 A254236 A252440 * A180650 A245008 A180330

Adjacent sequences: A066868 A066869 A066870 * A066872 A066873 A066874

Keyword

nonn,base

Author

Shyam Sunder Gupta, Jan 21 2002

Status

approved