19518681

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1$

素因数の和:166

約数の個数: 64

約数和(自身を含む): 34836480

約数和(自身を除く): 15317799

約数列:

[1, 3, 7, 13, 19, 21, 39, 53, 57, 71, 91, 133, 159, 213, 247, 273, 371, 399, 497, 689, 741, 923, 1007, 1113, 1349, 1491, 1729, 2067, 2769, 3021, 3763, 4047, 4823, 5187, 6461, 7049, 9443, 11289, 13091, 14469, 17537, 19383, 21147, 26341, 28329, 39273, 48919, 52611, 71497, 79023, 91637, 122759, 146757, 214491, 274911, 342433, 368277, 500479, 929461, 1027299, 1501437, 2788383, 6506227, 19518681]

約数ペア:

[(1, 19518681), (3, 6506227), (7, 2788383), (13, 1501437), (19, 1027299), (21, 929461), (39, 500479), (53, 368277), (57, 342433), (71, 274911), (91, 214491), (133, 146757), (159, 122759), (213, 91637), (247, 79023), (273, 71497), (371, 52611), (399, 48919), (497, 39273), (689, 28329), (741, 26341), (923, 21147), (1007, 19383), (1113, 17537), (1349, 14469), (1491, 13091), (1729, 11289), (2067, 9443), (2769, 7049), (3021, 6461), (3763, 5187), (4047, 4823)]