81203920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{145007}}^1$

素因数の和:145027

約数の個数: 40

約数和(自身を含む): 215771904

約数和(自身を除く): 134567984

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 145007, 290014, 580028, 725035, 1015049, 1160056, 1450070, 2030098, 2320112, 2900140, 4060196, 5075245, 5800280, 8120392, 10150490, 11600560, 16240784, 20300980, 40601960, 81203920]

約数ペア:

[(1, 81203920), (2, 40601960), (4, 20300980), (5, 16240784), (7, 11600560), (8, 10150490), (10, 8120392), (14, 5800280), (16, 5075245), (20, 4060196), (28, 2900140), (35, 2320112), (40, 2030098), (56, 1450070), (70, 1160056), (80, 1015049), (112, 725035), (140, 580028), (280, 290014), (560, 145007)]