21,994

2 × 7 × 1571

21,994 is even and not a perfect square. Its factorization is 2 × 7 × 1571 and its 8 divisors sum to 37,728.

Prime Factor Structure

Factorization String 2 × 7 × 1571

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 8

Divisor Sum (σ) 37,728

Proper Divisor Sum 15,734

Digit Sum / Digital Root 25 (Root: 7)

Adjacent Primes #21991 ← → #21997

Radix Representation

Decimal	21994
Binary	101010111101010 (15 bits)
Octal	0o52752
Hexadecimal	0x55EA

Divisor Catalog (8)

1 2 7 14 1,571 3,142 10,997 21,994

Collatz Trajectory (43 steps to reach 1)

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

21,994 10,997 32,992 16,496 8,248 4,124 2,062 1,031 3,094 1,547 4,642 2,321 6,964 3,482 1,741 5,224 2,612 1,306 653 1,960 980 490 245 736 368 184 92 46 23 70 35 106 53 160 80 40 20 10 5 16 8 4 2 1

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