19917261

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{293}}^1$

素因数の和:402

約数の個数: 48

約数和(自身を含む): 35957376

約数和(自身を除く): 16040115

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 83, 91, 117, 249, 273, 293, 581, 747, 819, 879, 1079, 1743, 2051, 2637, 3237, 3809, 5229, 6153, 7553, 9711, 11427, 18459, 22659, 24319, 26663, 34281, 67977, 72957, 79989, 170233, 218871, 239967, 316147, 510699, 948441, 1532097, 2213029, 2845323, 6639087, 19917261]

約数ペア:

[(1, 19917261), (3, 6639087), (7, 2845323), (9, 2213029), (13, 1532097), (21, 948441), (39, 510699), (63, 316147), (83, 239967), (91, 218871), (117, 170233), (249, 79989), (273, 72957), (293, 67977), (581, 34281), (747, 26663), (819, 24319), (879, 22659), (1079, 18459), (1743, 11427), (2051, 9711), (2637, 7553), (3237, 6153), (3809, 5229)]