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A364586
a(n) is the least number with exactly n divisors of the form 5*k+1.
3
1, 6, 36, 66, 252, 336, 672, 1008, 3528, 2016, 4032, 3696, 9072, 7392, 13104, 11088, 36288, 38304, 26208, 22176, 68544, 44352, 91728, 66528, 154224, 99792, 209664, 96096, 301392, 144144, 222768, 188496, 487872, 399168, 471744, 421344, 1079568, 288288, 1097712, 432432
OFFSET
1,2
PROG
(PARI) a(n) = my(k=1); while (sumdiv(k, d, (d%5)==1) != n, k++); k; \\ Michel Marcus, Jul 29 2023
CROSSREFS
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, Jul 28 2023
STATUS
approved