21039795

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{3929}}^1$

素因数の和:3964

約数の個数: 48

約数和(自身を含む): 44141760

約数和(自身を除く): 23101965

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 35, 45, 51, 63, 85, 105, 119, 153, 255, 315, 357, 595, 765, 1071, 1785, 3929, 5355, 11787, 19645, 27503, 35361, 58935, 66793, 82509, 137515, 176805, 200379, 247527, 333965, 412545, 467551, 601137, 1001895, 1237635, 1402653, 2337755, 3005685, 4207959, 7013265, 21039795]

約数ペア:

[(1, 21039795), (3, 7013265), (5, 4207959), (7, 3005685), (9, 2337755), (15, 1402653), (17, 1237635), (21, 1001895), (35, 601137), (45, 467551), (51, 412545), (63, 333965), (85, 247527), (105, 200379), (119, 176805), (153, 137515), (255, 82509), (315, 66793), (357, 58935), (595, 35361), (765, 27503), (1071, 19645), (1785, 11787), (3929, 5355)]