3 × 5² × 7 × 41

Prime Factor Structure

Factorization String 3 × 5^2 × 7 × 41

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 41,664

Proper Divisor Sum 20,139

Digit Sum / Digital Root 15 (Root: 6)

Adjacent Primes #21523 ← → #21529

1 3 5 7 15 21 25 35 41 75 105 123 175 205 287 525 615 861 1,025 1,435 3,075 4,305 7,175 21,525

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

21,525 64,576 32,288 16,144 8,072 4,036 2,018 1,009 3,028 1,514 757 2,272 1,136 568 284 142 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 1,336 668 334 167 502 251 754 377 1,132 566 283 850

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