Factors of 728

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What are the Factors of 728?

Answer

Factors of 728:

1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 182, 364, 728

16 factors · 728 = 2³ × 7 × 13 · composite

Underlined — prime: 2, 7, 13 · 1 — neither prime nor composite · others — composite

Factor pairs of 728

1 × 728
2 × 364
4 × 182
7 × 104
8 × 91
13 × 56
14 × 52
26 × 28

√728 ≈ 26.98 — the last pair 26 × 28 sits here; past it pairs repeat.

728 = 2³ × 7 × 13 → (3 + 1) × (1 + 1) × (1 + 1) = 16 factors: add 1 to each exponent and multiply.

Related Calculations

See Also

Prime Number Checker - Find out whether a given number is Prime or not
Prime Factorization - Prime Factorization Calculator
Prime Numbers List - List of all Prime Numbers - how many Prime numbers are between

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Factors Table

Number	Factors
713	1, 23, 31, 713
714	1, 2, 3, 6, 7, 14, 17, 21, 34, 42, 51, 102, 119, 238, 357, 714
715	1, 5, 11, 13, 55, 65, 143, 715
716	1, 2, 4, 179, 358, 716
717	1, 3, 239, 717
718	1, 2, 359, 718
719	1, 719
720	1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720
721	1, 7, 103, 721
722	1, 2, 19, 38, 361, 722
723	1, 3, 241, 723
724	1, 2, 4, 181, 362, 724
725	1, 5, 25, 29, 145, 725
726	1, 2, 3, 6, 11, 22, 33, 66, 121, 242, 363, 726
727	1, 727
728	1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 182, 364, 728
729	1, 3, 9, 27, 81, 243, 729
730	1, 2, 5, 10, 73, 146, 365, 730
731	1, 17, 43, 731
732	1, 2, 3, 4, 6, 12, 61, 122, 183, 244, 366, 732
733	1, 733
734	1, 2, 367, 734
735	1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 735
736	1, 2, 4, 8, 16, 23, 32, 46, 92, 184, 368, 736
737	1, 11, 67, 737
738	1, 2, 3, 6, 9, 18, 41, 82, 123, 246, 369, 738
739	1, 739
740	1, 2, 4, 5, 10, 20, 37, 74, 148, 185, 370, 740
741	1, 3, 13, 19, 39, 57, 247, 741
742	1, 2, 7, 14, 53, 106, 371, 742

FAQ

What are the Factors of 728?

Factors of 728: 1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 182, 364, 728

How many factors does 728 have?

Number 728 has 16 factors

How many Factor Pairs does 728 have?

Number 728 has 8 factor pairs

Is 728 a prime or composite number?

Composite: 728 = 2³ × 7 × 13, so it has 16 factors — a prime has exactly two.

How many factors does 728 have excluding 1 and 728?

14: 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 182 and 364.