721,340

2² × 5 × 36067

Prime Factor Structure

Factorization String 2^2 × 5 × 36067

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Total Divisors 12

Divisor Sum (σ) 1,514,856

Proper Divisor Sum 793,516

Digit Sum / Digital Root 17 (Root: 8)

Adjacent Primes #721337 ← → #721351

1 2 4 5 10 20 36,067 72,134 144,268 180,335 360,670 721,340

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

721,340 360,670 180,335 541,006 270,503 811,510 405,755 1,217,266 608,633 1,825,900 912,950 456,475 1,369,426 684,713 2,054,140 1,027,070 513,535 1,540,606 770,303 2,310,910 1,155,455 3,466,366 1,733,183 5,199,550 2,599,775 7,799,326 3,899,663 11,698,990 5,849,495 17,548,486 8,774,243 26,322,730 13,161,365 39,484,096 19,742,048 9,871,024 4,935,512 2,467,756 1,233,878 616,939 1,850,818 925,409 2,776,228 1,388,114 694,057 2,082,172 1,041,086 520,543 1,561,630 780,815 2,342,446 1,171,223 3,513,670 1,756,835 5,270,506 2,635,253 7,905,760 3,952,880 1,976,440 988,220

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