9588151

Appears in sequences

• Divisors of 2^39 - 1.at n=10A003545
• Cyclotomic polynomials at x=2.at n=39A019320
• a(n) = (2^n - 1)/product(2^p - 1) where the product is over all distinct primes p that divide n.at n=38A055515
• Zsigmondy numbers for a = 2, b = 1: Zs(n, 2, 1) is the greatest divisor of 2^n - 1 (A000225) that is coprime to 2^m - 1 for all positive integers m < n.at n=38A064078
• Quotient of A000225 and A064084.at n=38A064085
• Condensed version of A064085: all terms of A064085 with values greater than 1 (which coincides with all terms of A064085 with nonprime power index).at n=18A064086
• a(n) = sigma_3(n^3)/sigma(n^3).at n=15A077454
• Numbers of the form (2^(i*j)-1)/((2^i-1)*(2^j-1)) where gcd(i,j) = 1.at n=23A112674
• a(n) is the maximal overpseudoprime q to base 2 such that the multiplicative order of 2 mod q equals A143584(n).at n=8A131952
• Numbers of the form (2^(p*q)-1) /((2^p-1)*(2^q-1)), where p>q are primes.at n=12A140803
• Numbers of the form (4^p + 2^p + 1)/7, where p > 3 is prime.at n=3A143012