216712905

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{337}}^1\times {\mathrm{997}}^1$

素因数の和:1385

約数の個数: 32

約数和(自身を含む): 356214144

約数和(自身を除く): 139501239

約数列:

[1, 3, 5, 15, 43, 129, 215, 337, 645, 997, 1011, 1685, 2991, 4985, 5055, 14491, 14955, 42871, 43473, 72455, 128613, 214355, 217365, 335989, 643065, 1007967, 1679945, 5039835, 14447527, 43342581, 72237635, 216712905]

約数ペア:

[(1, 216712905), (3, 72237635), (5, 43342581), (15, 14447527), (43, 5039835), (129, 1679945), (215, 1007967), (337, 643065), (645, 335989), (997, 217365), (1011, 214355), (1685, 128613), (2991, 72455), (4985, 43473), (5055, 42871), (14491, 14955)]