19965825

素因数分解:

$3^3\times 5^2\times {\mathrm{11}}^1\times {\mathrm{2689}}^1$

素因数の和:2719

約数の個数: 48

約数和(自身を含む): 40027200

約数和(自身を除く): 20061375

約数列:

[1, 3, 5, 9, 11, 15, 25, 27, 33, 45, 55, 75, 99, 135, 165, 225, 275, 297, 495, 675, 825, 1485, 2475, 2689, 7425, 8067, 13445, 24201, 29579, 40335, 67225, 72603, 88737, 121005, 147895, 201675, 266211, 363015, 443685, 605025, 739475, 798633, 1331055, 1815075, 2218425, 3993165, 6655275, 19965825]

約数ペア:

[(1, 19965825), (3, 6655275), (5, 3993165), (9, 2218425), (11, 1815075), (15, 1331055), (25, 798633), (27, 739475), (33, 605025), (45, 443685), (55, 363015), (75, 266211), (99, 201675), (135, 147895), (165, 121005), (225, 88737), (275, 72603), (297, 67225), (495, 40335), (675, 29579), (825, 24201), (1485, 13445), (2475, 8067), (2689, 7425)]