21,284

2² × 17 × 313

Prime Factor Structure

Factorization String 2^2 × 17 × 313

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Total Divisors 12

Divisor Sum (σ) 39,564

Proper Divisor Sum 18,280

Digit Sum / Digital Root 17 (Root: 8)

Adjacent Primes #21283 ← → #21313

1 2 4 17 34 68 313 626 1,252 5,321 10,642 21,284

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

21,284 10,642 5,321 15,964 7,982 3,991 11,974 5,987 17,962 8,981 26,944 13,472 6,736 3,368 1,684 842 421 1,264 632 316 158 79 238 119 358 179 538 269 808 404 202 101 304 152 76 38 19 58 29 88 44 22 11 34 17 52 26 13 40 20 10 5 16 8 4 2 1

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