A115917 Numbers k such that sigma(k) - phi(k) is a brilliant number (A078972).

6, 10, 49, 242, 289, 512, 578, 800, 900, 1250, 2048, 5041, 15625, 17424, 22201, 22472, 26450, 28900, 48400, 60025, 62001, 65536, 69169, 91592, 131072, 144722, 146689, 151321, 160801, 201601, 212521, 236196, 242064, 252050, 253009

Offset: 1

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

Examples

			sigma(62001) - phi(62001) = 49813 = 109*457.
		

Crossrefs

Cf. A078972, A115916.