In mathematics, factorials are represented by “n!” where any non-negative number is multiplied by itself and its descending whole numbers. Therefore,

• 1! = 1.
• 2! = 2 x 1 = 2.
• 3! = 3 x 2 x 1 = 6.
• 4! = 4 x 3 x 2 x 1 =24.
• 5! = 5 x 4 x 3 x 2 x 1 = 120.
• 6! = 6 x 5 x 4 x 3 x 2 x 1 = 720.
• 10! = 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1 = 3,628,800
• 20! = 20 x 19 x 18 x 17 x 16 x 15 x 14 x 13 x 12 x 11 x 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1 = 2.4329 X 10¹⁸
  • or 2,432,902,008,176,640,000
• 30!  = 2.653 X 10³²
  • or 265,252,859,812,191,000,000,000,000,000,000
• 40! = 8.159 X 10⁴⁷
  • or 815,915,283,247,898,000,000,000,000,000,000,000,000,000,000,000
• 50! = 3.04141 X 10⁶⁴
  • or 30,414,093,201,713,400,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000
• 60! = 8.32099 X 10⁸¹
  • or 8,320,987,112,741,390,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000
• 70! = 1.1979 X 10¹⁰⁰
  • or 11,978,571,669,969,900,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000
• 80! = 7.1569 X 10¹¹⁸
  • or 71,569,457,046,263,800,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000
• 90! = 1.4857 X 10¹³⁸
• 100! =  9.3326 X 10¹⁵⁷
• 110!  = 1.5882 X 10¹⁷⁸
• 120!  = 6.6895 X 10¹⁹⁸
• 130!  = 6.4669 X 10²¹⁹
• 140!  = 1.3462 X 10²⁴¹
• 150!  = 5.7134 X 10²⁶²
• 160!  = 4.7147 X 10²⁸⁴
• 170!  = 7.2574 X 10³⁰⁶
• . . . etc., . . .