20742160

素因数分解:

$2^4\times 5^1\times {\mathrm{259277}}^1$

素因数の和:259290

約数の個数: 20

約数和(自身を含む): 48225708

約数和(自身を除く): 27483548

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 259277, 518554, 1037108, 1296385, 2074216, 2592770, 4148432, 5185540, 10371080, 20742160]

約数ペア:

[(1, 20742160), (2, 10371080), (4, 5185540), (5, 4148432), (8, 2592770), (10, 2074216), (16, 1296385), (20, 1037108), (40, 518554), (80, 259277)]