81701720

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47501}}^1$

素因数の和:47555

約数の個数: 32

約数和(自身を含む): 188107920

約数和(自身を除く): 106406200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 47501, 95002, 190004, 237505, 380008, 475010, 950020, 1900040, 2042543, 4085086, 8170172, 10212715, 16340344, 20425430, 40850860, 81701720]

約数ペア:

[(1, 81701720), (2, 40850860), (4, 20425430), (5, 16340344), (8, 10212715), (10, 8170172), (20, 4085086), (40, 2042543), (43, 1900040), (86, 950020), (172, 475010), (215, 380008), (344, 237505), (430, 190004), (860, 95002), (1720, 47501)]