A077516 Largest n-digit number beginning with n and having n divisors, or 0 if no such number exists.

1, 29, 361, 4997, 0, 699964, 0, 89999995, 999887641, 1099999504, 0, 129999999988, 0, 14999999996224, 159999933195664, 1699999999999998, 0, 189999999999999477, 0, 20999999999999999817, 219999996968515384384, 2299999999999999765504, 0, 249999999999999999999988

Offset: 1

Author

Amarnath Murthy, Nov 08 2002

Keywords

• base
• nonn

Examples

			a(4) = 4989 = 3*1663 has 4 divisors: 1, 3, 1663 and 4989. a(5) = 0 as 13^4 = 28561 < 50000 < 59999 < 83521 = 17^4.
		

Crossrefs

Cf. A077515.

Extensions

Corrected and extended by Ray Chandler, Aug 15 2003

a(24) from Jon E. Schoenfield, Mar 17 2022