3 × 5 × 7 × 197

Prime Factor Structure

Factorization String 3 × 5 × 7 × 197

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 38,016

Proper Divisor Sum 17,331

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #20681 ← → #20693

1 3 5 7 15 21 35 105 197 591 985 1,379 2,955 4,137 6,895 20,685

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

20,685 62,056 31,028 15,514 7,757 23,272 11,636 5,818 2,909 8,728 4,364 2,182 1,091 3,274 1,637 4,912 2,456 1,228 614 307 922 461 1,384 692 346 173 520 260 130 65 196 98 49 148 74 37 112 56 28 14 7 22 11 34 17 52 26 13 40 20 10 5 16 8 4 2 1

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