2² × 5 × 7 × 991

Prime Factor Structure

Factorization String 2^2 × 5 × 7 × 991

Distinct Prime Factors 4

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 333,312

Proper Divisor Sum 194,572

Digit Sum / Digital Root 23 (Root: 5)

Adjacent Primes #138739 ← → #138763

1 2 4 5 7 10 14 20 28 35 70 140 991 1,982 3,964 4,955 6,937 9,910 13,874 19,820 27,748 34,685 69,370 138,740

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

138,740 69,370 34,685 104,056 52,028 26,014 13,007 39,022 19,511 58,534 29,267 87,802 43,901 131,704 65,852 32,926 16,463 49,390 24,695 74,086 37,043 111,130 55,565 166,696 83,348 41,674 20,837 62,512 31,256 15,628 7,814 3,907 11,722 5,861 17,584 8,792 4,396 2,198 1,099 3,298 1,649 4,948 2,474 1,237 3,712 1,856 928 464 232 116 58 29 88 44 22 11 34 17 52 26

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