20807130981

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^2\times {\mathrm{631}}^1$

素因数の和:803

約数の個数: 96

約数和(自身を含む): 35667208192

約数和(自身を除く): 14860077211

約数列:

[1, 3, 7, 13, 21, 39, 43, 53, 91, 129, 159, 273, 301, 371, 559, 631, 689, 903, 1113, 1677, 1893, 2067, 2279, 2809, 3913, 4417, 4823, 6837, 8203, 8427, 11739, 13251, 14469, 15953, 19663, 24609, 27133, 29627, 33443, 36517, 47859, 57421, 58989, 81399, 88881, 100329, 109551, 120787, 172263, 189931, 207389, 234101, 255619, 352729, 362361, 434759, 569793, 622167, 702303, 766857, 845509, 1058187, 1304277, 1438049, 1570231, 1772479, 2469103, 2536527, 3043313, 4314147, 4710693, 5317437, 7407309, 9129939, 10066343, 10991617, 12407353, 18694637, 23042227, 30199029, 32974851, 37222059, 56083911, 69126681, 76216597, 130862459, 161295589, 228649791, 392587377, 483886767, 533516179, 990815761, 1600548537, 2972447283, 6935710327, 20807130981]

約数ペア:

[(1, 20807130981), (3, 6935710327), (7, 2972447283), (13, 1600548537), (21, 990815761), (39, 533516179), (43, 483886767), (53, 392587377), (91, 228649791), (129, 161295589), (159, 130862459), (273, 76216597), (301, 69126681), (371, 56083911), (559, 37222059), (631, 32974851), (689, 30199029), (903, 23042227), (1113, 18694637), (1677, 12407353), (1893, 10991617), (2067, 10066343), (2279, 9129939), (2809, 7407309), (3913, 5317437), (4417, 4710693), (4823, 4314147), (6837, 3043313), (8203, 2536527), (8427, 2469103), (11739, 1772479), (13251, 1570231), (14469, 1438049), (15953, 1304277), (19663, 1058187), (24609, 845509), (27133, 766857), (29627, 702303), (33443, 622167), (36517, 569793), (47859, 434759), (57421, 362361), (58989, 352729), (81399, 255619), (88881, 234101), (100329, 207389), (109551, 189931), (120787, 172263)]