18887323

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{421}}^1$

素因数の和:487

約数の個数: 32

約数和(自身を含む): 25522560

約数和(自身を除く): 6635237

約数列:

[1, 7, 13, 17, 29, 91, 119, 203, 221, 377, 421, 493, 1547, 2639, 2947, 3451, 5473, 6409, 7157, 12209, 38311, 44863, 50099, 85463, 93041, 158717, 207553, 651287, 1111019, 1452871, 2698189, 18887323]

約数ペア:

[(1, 18887323), (7, 2698189), (13, 1452871), (17, 1111019), (29, 651287), (91, 207553), (119, 158717), (203, 93041), (221, 85463), (377, 50099), (421, 44863), (493, 38311), (1547, 12209), (2639, 7157), (2947, 6409), (3451, 5473)]