20618195

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{397}}^1$

素因数の和:479

約数の個数: 32

約数和(自身を含む): 28885248

約数和(自身を除く): 8267053

約数列:

[1, 5, 13, 17, 47, 65, 85, 221, 235, 397, 611, 799, 1105, 1985, 3055, 3995, 5161, 6749, 10387, 18659, 25805, 33745, 51935, 87737, 93295, 242567, 317203, 438685, 1212835, 1586015, 4123639, 20618195]

約数ペア:

[(1, 20618195), (5, 4123639), (13, 1586015), (17, 1212835), (47, 438685), (65, 317203), (85, 242567), (221, 93295), (235, 87737), (397, 51935), (611, 33745), (799, 25805), (1105, 18659), (1985, 10387), (3055, 6749), (3995, 5161)]