18911799

素因数分解:

$3^4\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{97}}^1$

素因数の和:221

約数の個数: 40

約数和(自身を含む): 29882160

約数和(自身を除く): 10970361

約数列:

[1, 3, 9, 27, 29, 81, 83, 87, 97, 249, 261, 291, 747, 783, 873, 2241, 2349, 2407, 2619, 2813, 6723, 7221, 7857, 8051, 8439, 21663, 24153, 25317, 64989, 72459, 75951, 194967, 217377, 227853, 233479, 652131, 700437, 2101311, 6303933, 18911799]

約数ペア:

[(1, 18911799), (3, 6303933), (9, 2101311), (27, 700437), (29, 652131), (81, 233479), (83, 227853), (87, 217377), (97, 194967), (249, 75951), (261, 72459), (291, 64989), (747, 25317), (783, 24153), (873, 21663), (2241, 8439), (2349, 8051), (2407, 7857), (2619, 7221), (2813, 6723)]