257590040

素因数分解:

$2^3\times 5^1\times {\mathrm{6439751}}^1$

素因数の和:6439762

約数の個数: 16

約数和(自身を含む): 579577680

約数和(自身を除く): 321987640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 6439751, 12879502, 25759004, 32198755, 51518008, 64397510, 128795020, 257590040]

約数ペア:

[(1, 257590040), (2, 128795020), (4, 64397510), (5, 51518008), (8, 32198755), (10, 25759004), (20, 12879502), (40, 6439751)]