21391425

素因数分解:

$3^3\times 5^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1$

素因数の和:140

約数の個数: 96

約数和(自身を含む): 44520960

約数和(自身を除く): 23129535

約数列:

[1, 3, 5, 9, 11, 15, 25, 27, 33, 43, 45, 55, 67, 75, 99, 129, 135, 165, 201, 215, 225, 275, 297, 335, 387, 473, 495, 603, 645, 675, 737, 825, 1005, 1075, 1161, 1419, 1485, 1675, 1809, 1935, 2211, 2365, 2475, 2881, 3015, 3225, 3685, 4257, 5025, 5805, 6633, 7095, 7425, 8643, 9045, 9675, 11055, 11825, 12771, 14405, 15075, 18425, 19899, 21285, 25929, 29025, 31691, 33165, 35475, 43215, 45225, 55275, 63855, 72025, 77787, 95073, 99495, 106425, 129645, 158455, 165825, 216075, 285219, 319275, 388935, 475365, 497475, 648225, 792275, 855657, 1426095, 1944675, 2376825, 4278285, 7130475, 21391425]

約数ペア:

[(1, 21391425), (3, 7130475), (5, 4278285), (9, 2376825), (11, 1944675), (15, 1426095), (25, 855657), (27, 792275), (33, 648225), (43, 497475), (45, 475365), (55, 388935), (67, 319275), (75, 285219), (99, 216075), (129, 165825), (135, 158455), (165, 129645), (201, 106425), (215, 99495), (225, 95073), (275, 77787), (297, 72025), (335, 63855), (387, 55275), (473, 45225), (495, 43215), (603, 35475), (645, 33165), (675, 31691), (737, 29025), (825, 25929), (1005, 21285), (1075, 19899), (1161, 18425), (1419, 15075), (1485, 14405), (1675, 12771), (1809, 11825), (1935, 11055), (2211, 9675), (2365, 9045), (2475, 8643), (2881, 7425), (3015, 7095), (3225, 6633), (3685, 5805), (4257, 5025)]