2² × 5² × 6491

Prime Factor Structure

Factorization String 2^2 × 5^2 × 6491

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 18

Divisor Sum (σ) 1,408,764

Proper Divisor Sum 759,664

Digit Sum / Digital Root 20 (Root: 2)

Adjacent Primes #649093 ← → #649123

1 2 4 5 10 20 25 50 100 6,491 12,982 25,964 32,455 64,910 129,820 162,275 324,550 649,100

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

649,100 324,550 162,275 486,826 243,413 730,240 365,120 182,560 91,280 45,640 22,820 11,410 5,705 17,116 8,558 4,279 12,838 6,419 19,258 9,629 28,888 14,444 7,222 3,611 10,834 5,417 16,252 8,126 4,063 12,190 6,095 18,286 9,143 27,430 13,715 41,146 20,573 61,720 30,860 15,430 7,715 23,146 11,573 34,720 17,360 8,680 4,340 2,170 1,085 3,256 1,628 814 407 1,222 611 1,834 917 2,752 1,376 688

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