81027280

素因数分解:

$2^4\times 5^1\times {\mathrm{137}}^1\times {\mathrm{7393}}^1$

素因数の和:7543

約数の個数: 40

約数和(自身を含む): 189789192

約数和(自身を除く): 108761912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 137, 274, 548, 685, 1096, 1370, 2192, 2740, 5480, 7393, 10960, 14786, 29572, 36965, 59144, 73930, 118288, 147860, 295720, 591440, 1012841, 2025682, 4051364, 5064205, 8102728, 10128410, 16205456, 20256820, 40513640, 81027280]

約数ペア:

[(1, 81027280), (2, 40513640), (4, 20256820), (5, 16205456), (8, 10128410), (10, 8102728), (16, 5064205), (20, 4051364), (40, 2025682), (80, 1012841), (137, 591440), (274, 295720), (548, 147860), (685, 118288), (1096, 73930), (1370, 59144), (2192, 36965), (2740, 29572), (5480, 14786), (7393, 10960)]