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A063737 Numbers n such that sum of digits of n is equal to the sum of the prime factors of n, counted with multiplicity. 7
2, 3, 4, 5, 7, 27, 378, 576, 588, 648, 729, 2688, 17496, 19683, 49896, 69888, 3796875, 3857868, 4898880, 5878656, 7077888, 8957952, 2499898464, 34998578496, 49997969280, 2928898896840, 7625597484987, 184958866998359685 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(29) > 10^30. - Giovanni Resta, Apr 23 2017

LINKS

Table of n, a(n) for n=1..28.

EXAMPLE

27=3*3*3, 2+7=9, 3+3+3=9. 49896 = 2*2*2*3*3*3*3*7*11, 4+9+8+9+6 = 36, 2+2+2+3+3+3+3+7+11 = 36.

PROG

(ARIBAS): var stk: stack; end; for n := 1 to 2000000 do s := itoa(n); for j := 0 to length(s) - 1 do stack_push(stk, atoi(s[j..j])); end; if sum(stack2array(stk)) = sum(factorlist(n)) then write(n, " "); end; end; .

CROSSREFS

Cf. A001414, A007953.

Sequence in context: A273932 A270831 A063738 * A278342 A276522 A135709

Adjacent sequences:  A063734 A063735 A063736 * A063738 A063739 A063740

KEYWORD

base,easy,nonn

AUTHOR

Felice Russo, Aug 13 2001

EXTENSIONS

More terms from Klaus Brockhaus, Aug 17 2001

More terms from David Wasserman, Jul 11 2002

STATUS

approved

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Last modified June 6 18:59 EDT 2020. Contains 334832 sequences. (Running on oeis4.)