81131787

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{107}}^1$

素因数の和:190

約数の個数: 80

約数和(自身を含む): 143016192

約数和(自身を除く): 61884405

約数列:

[1, 3, 9, 11, 23, 27, 33, 37, 69, 81, 99, 107, 111, 207, 253, 297, 321, 333, 407, 621, 759, 851, 891, 963, 999, 1177, 1221, 1863, 2277, 2461, 2553, 2889, 2997, 3531, 3663, 3959, 6831, 7383, 7659, 8667, 9361, 10593, 10989, 11877, 20493, 22149, 22977, 27071, 28083, 31779, 32967, 35631, 43549, 66447, 68931, 81213, 84249, 91057, 95337, 106893, 130647, 199341, 243639, 252747, 273171, 320679, 391941, 730917, 758241, 819513, 1001627, 1175823, 2192751, 2458539, 3004881, 3527469, 7375617, 9014643, 27043929, 81131787]

約数ペア:

[(1, 81131787), (3, 27043929), (9, 9014643), (11, 7375617), (23, 3527469), (27, 3004881), (33, 2458539), (37, 2192751), (69, 1175823), (81, 1001627), (99, 819513), (107, 758241), (111, 730917), (207, 391941), (253, 320679), (297, 273171), (321, 252747), (333, 243639), (407, 199341), (621, 130647), (759, 106893), (851, 95337), (891, 91057), (963, 84249), (999, 81213), (1177, 68931), (1221, 66447), (1863, 43549), (2277, 35631), (2461, 32967), (2553, 31779), (2889, 28083), (2997, 27071), (3531, 22977), (3663, 22149), (3959, 20493), (6831, 11877), (7383, 10989), (7659, 10593), (8667, 9361)]