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Composite numbers that divide the concatenation of the reverse of their ascending order prime factors, with repetition
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d36f768a02
new file: oeis-research/Scott R. Shannon/Composite numbers that divide the concatenation of the reverse of their ascending order prime factors, with repetition, when written in binary/prog.pl
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3 weeks ago |
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Composite numbers that divide the concatenation of the reverse of their ascending order prime factors, with repetition, when written in binary
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d36f768a02
new file: oeis-research/Scott R. Shannon/Composite numbers that divide the concatenation of the reverse of their ascending order prime factors, with repetition, when written in binary/prog.pl
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3 weeks ago |
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Composite numbers that divide the reverse of the concatenation of their ascending order prime factors, with repetition
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d36f768a02
new file: oeis-research/Scott R. Shannon/Composite numbers that divide the concatenation of the reverse of their ascending order prime factors, with repetition, when written in binary/prog.pl
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3 weeks ago |
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Smallest positive number that has yet appeared such that the sum of all terms a(1) + ... + a(n) has the same number of prime factors
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61449f48a1
Update.
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8 months ago |
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The smallest composite number k that shares exactly n distinct prime factors with sopfr(k), the sum of the primes dividing k, with repetition
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ee26f2f69e
new file: oeis-research/Robert Israel/Least k for which A237196(k) = n/prog.pl
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2 weeks ago |
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The smallest number whose prime factor concatenation, when written in base n, contains all digits 0,1,...,(n-1)
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d36f768a02
new file: oeis-research/Scott R. Shannon/Composite numbers that divide the concatenation of the reverse of their ascending order prime factors, with repetition, when written in binary/prog.pl
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3 weeks ago |
