21136005

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{331}}^1$

素因数の和:399

約数の個数: 64

約数和(自身を含む): 42071040

約数和(自身を除く): 20935035

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 43, 45, 55, 99, 129, 135, 165, 215, 297, 331, 387, 473, 495, 645, 993, 1161, 1419, 1485, 1655, 1935, 2365, 2979, 3641, 4257, 4965, 5805, 7095, 8937, 10923, 12771, 14233, 14895, 18205, 21285, 32769, 42699, 44685, 54615, 63855, 71165, 98307, 128097, 156563, 163845, 213495, 384291, 469689, 491535, 640485, 782815, 1409067, 1921455, 2348445, 4227201, 7045335, 21136005]

約数ペア:

[(1, 21136005), (3, 7045335), (5, 4227201), (9, 2348445), (11, 1921455), (15, 1409067), (27, 782815), (33, 640485), (43, 491535), (45, 469689), (55, 384291), (99, 213495), (129, 163845), (135, 156563), (165, 128097), (215, 98307), (297, 71165), (331, 63855), (387, 54615), (473, 44685), (495, 42699), (645, 32769), (993, 21285), (1161, 18205), (1419, 14895), (1485, 14233), (1655, 12771), (1935, 10923), (2365, 8937), (2979, 7095), (3641, 5805), (4257, 4965)]