21157080
21,157,080 is an even composite number composed of six prime numbers multiplied together.
21157080 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of one hundred twenty-eight divisors.
Prime factorization of 21157080:
23 × 3 × 5 × 7 × 89 × 283
(2 × 2 × 2 × 3 × 5 × 7 × 89 × 283)See below for interesting mathematical facts about the number 21157080 from the Numbermatics database.
Names of 21157080
- Cardinal: 21157080 can be written as Twenty-one million, one hundred fifty-seven thousand and eighty.
Scientific notation
- Scientific notation: 2.115708 × 107
Factors of 21157080
Divisors of 21157080
- Number of divisors d(n): 128
-
Complete list of divisors:
1 2 3 4 5 6 7 8 10 12 14 15 20 21 24 28 30 35 40 42 56 60 70 84 89 105 120 140 168 178 210 267 280 283 356 420 445 534 566 623 712 840 849 890 1068 1132 1246 1335 1415 1698 1780 1869 1981 2136 2264 2492 2670 2830 3115 3396 3560 3738 3962 4245 4984 5340 5660 5943 6230 6792 7476 7924 8490 9345 9905 10680 11320 11886 12460 14952 15848 16980 18690 19810 23772 24920 25187 29715 33960 37380 39620 47544 50374 59430 74760 75561 79240 100748 118860 125935 151122 176309 201496 237720 251870 302244 352618 377805 503740 528927 604488 705236 755610 881545 1007480 1057854 1410472 1511220 1763090 2115708 2644635 3022440 3526180 4231416 5289270 7052360 10578540 21157080
- Sum of all divisors σ(n): 73612800
- Sum of proper divisors (its aliquot sum) s(n): 52455720
- 21157080 is an abundant number, because the sum of its proper divisors (52455720) is greater than itself. Its abundance is 31298640
Bases of 21157080
- Binary: 10100001011010100110110002
- Hexadecimal: 0x142D4D8
- Base-36: CLGWO
Squares and roots of 21157080
- 21157080 squared (211570802) is 447622034126400
- 21157080 cubed (211570803) is 9470375185774974912000
-
The
square root of 21157080 is 4599.6825977451 -
The
cube root of 21157080 is 276.5786013479
Scales and comparisons
How big is 21157080?- 21,157,080 seconds is equal to 34 weeks, 6 days, 20 hours, 58 minutes.
-
To count from 1 to 21,157,080 would take you about three days!
This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)
- A cube with a volume of 21157080 cubic inches would be around 23 feet tall.
Recreational maths with 21157080
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The information we have on file for 21157080 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!
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