2⁵ × 5² × 821

Prime Factor Structure

Factorization String 2^5 × 5^2 × 821

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 36

Divisor Sum (σ) 1,605,366

Proper Divisor Sum 948,566

Digit Sum / Digital Root 25 (Root: 7)

Adjacent Primes #656791 ← → #656809

1 2 4 5 8 10 16 20 25 32 40 50 80 100 160 200 400 800 821 1,642 3,284 4,105 6,568 8,210 13,136 16,420 20,525 26,272 32,840 41,050 65,680 82,100 131,360 164,200 328,400 656,800

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

656,800 328,400 164,200 82,100 41,050 20,525 61,576 30,788 15,394 7,697 23,092 11,546 5,773 17,320 8,660 4,330 2,165 6,496 3,248 1,624 812 406 203 610 305 916 458 229 688 344 172 86 43 130 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

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