161757621

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{131}}^1$

素因数の和:271

約数の個数: 64

約数和(自身を含む): 266112000

約数和(自身を除く): 104354379

約数列:

[1, 3, 9, 19, 27, 29, 57, 83, 87, 131, 171, 249, 261, 393, 513, 551, 747, 783, 1179, 1577, 1653, 2241, 2407, 2489, 3537, 3799, 4731, 4959, 7221, 7467, 10873, 11397, 14193, 14877, 21663, 22401, 32619, 34191, 42579, 45733, 64989, 67203, 72181, 97857, 102573, 137199, 206587, 216543, 293571, 315317, 411597, 619761, 649629, 945951, 1234791, 1859283, 1948887, 2837853, 5577849, 5991023, 8513559, 17973069, 53919207, 161757621]

約数ペア:

[(1, 161757621), (3, 53919207), (9, 17973069), (19, 8513559), (27, 5991023), (29, 5577849), (57, 2837853), (83, 1948887), (87, 1859283), (131, 1234791), (171, 945951), (249, 649629), (261, 619761), (393, 411597), (513, 315317), (551, 293571), (747, 216543), (783, 206587), (1179, 137199), (1577, 102573), (1653, 97857), (2241, 72181), (2407, 67203), (2489, 64989), (3537, 45733), (3799, 42579), (4731, 34191), (4959, 32619), (7221, 22401), (7467, 21663), (10873, 14877), (11397, 14193)]