A359956 -id:A359956 - cp's OEIS frontend

A359955 a(n) is the smallest number with exactly n divisors that are greater than or equal to 4.

4, 8, 12, 20, 24, 36, 48, 80, 60, 140, 192, 144, 120, 280, 180, 700, 240, 560, 1600, 5120, 360, 1120, 10000, 900, 960, 2240, 720, 2800, 840, 3080, 25600, 5184, 1260, 5600, 175175, 36864, 1680, 6160, 2880, 11200, 15360, 3600, 19600, 3705625, 2520, 12320, 6480, 70000

Offset: 1

Ilya Gutkovskiy, Jan 19 2023

nonn

Index entries for sequences related to divisors of numbers

Cf. A005179, A321014, A359956, A359957.

a(n) = my(k=1); while (sumdiv(k, d, (d>=4)) != n, k++); k; \\ Michel Marcus, Jan 20 2023

A359957 a(n) is the smallest number with exactly n divisors that are greater than or equal to 6.

Original entry on oeis.org

6, 12, 18, 24, 36, 48, 60, 72, 126, 192, 120, 168, 180, 252, 240, 336, 576, 3072, 360, 504, 1296, 900, 960, 1344, 720, 1008, 840, 1512, 4158, 27027, 1260, 2016, 9702, 63063, 1680, 3024, 2880, 4032, 15360, 3600, 7056, 94864, 2520, 5544, 6480, 9072, 61440, 86016

Offset: 1

Ilya Gutkovskiy, Jan 19 2023

nonn

Index entries for sequences related to divisors of numbers

Cf. A005179, A338649, A359955, A359956.

Table[SelectFirst[Table[{n,Count[Divisors[n],?(#>5&)]},{n,100000}],#[[2]]==k&],{k,50}] [[;;,1]] (* _Harvey P. Dale, Jan 04 2024 *)

a(n) = my(k=1); while (sumdiv(k, d, (d>=6)) != n, k++); k; \\ Michel Marcus, Jan 20 2023

A359958 a(n) is the smallest number with exactly n divisors that are greater than or equal to n.

Original entry on oeis.org

1, 4, 15, 20, 30, 48, 72, 160, 120, 210, 252, 240, 560, 360, 480, 864, 900, 720, 1200, 840, 1512, 1440, 1800, 2400, 2160, 3024, 2880, 4032, 3600, 2520, 3960, 5280, 6480, 9072, 14256, 6720, 8640, 5040, 12480, 7920, 7560, 9240, 11880, 16632, 20790, 10080, 12600, 15840

Offset: 1

Ilya Gutkovskiy, Jan 19 2023

nonn

Index entries for sequences related to divisors of numbers

Cf. A005179, A359955, A359956, A359957.

a(n) = my(k=1); while (sumdiv(k, d, (d>=n)) != n, k++); k; \\ Michel Marcus, Jan 20 2023

cp's OEIS Frontend

A359955 a(n) is the smallest number with exactly n divisors that are greater than or equal to 4.

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A359957 a(n) is the smallest number with exactly n divisors that are greater than or equal to 6.

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Mathematica

PARI

A359958 a(n) is the smallest number with exactly n divisors that are greater than or equal to n.

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Author

Keywords

Links

Crossrefs

Programs

PARI