2² × 5² × 13 × 17 × 31

Prime Factor Structure

Factorization String 2^2 × 5^2 × 13 × 17 × 31

Distinct Prime Factors 5

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 72

Divisor Sum (σ) 1,749,888

Proper Divisor Sum 1,064,788

Digit Sum / Digital Root 20 (Root: 2)

Adjacent Primes #685099 ← → #685103

1 2 4 5 10 13 17 20 25 26 31 34 50 52 62 65 68 85 100 124 130 155 170 221 260 310 325 340 403 425 442 527 620 650 775 806 850 884 1,054 1,105 1,300 1,550 1,612 1,700 2,015 2,108 2,210 2,635 3,100 4,030 4,420 5,270 5,525 6,851 8,060 10,075 10,540 11,050 13,175 13,702

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

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