If-a-natural-number-of-3-digit-for-example-N-abc-such-that-N-100a-10b-c-a-b-c-Find-all-N-of-any-number-of-digits-e-g-N-1-2-145-

Question Number 151801 by ajfour last updated on 23/Aug/21

I f a n a t u r a l n u m b e r o f 3 d i g i t

(f o r e x a m p l e) N = a b c s u c h t h a t

N = 100 a + 10 b + c = a! + b! + c!

F i n d a l l N o f a n y n u m b e r o f

d i g i t s .

e . g . N = 1, 2, 145, \dots