2² × 5 × 13 × 257

Prime Factor Structure

Factorization String 2^2 × 5 × 13 × 257

Distinct Prime Factors 4

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 151,704

Proper Divisor Sum 84,884

Digit Sum / Digital Root 22 (Root: 4)

Adjacent Primes #66809 ← → #66821

1 2 4 5 10 13 20 26 52 65 130 257 260 514 1,028 1,285 2,570 3,341 5,140 6,682 13,364 16,705 33,410 66,820

Iterative sequence n → n/2 (if even) or 3n+1 (if odd):

66,820 33,410 16,705 50,116 25,058 12,529 37,588 18,794 9,397 28,192 14,096 7,048 3,524 1,762 881 2,644 1,322 661 1,984 992 496 248 124 62 31 94 47 142 71 214 107 322 161 484 242 121 364 182 91 274 137 412 206 103 310 155 466 233 700 350 175 526 263 790 395 1,186 593 1,780 890 445

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