20475640

素因数分解:

$2^3\times 5^1\times {\mathrm{511891}}^1$

素因数の和:511902

約数の個数: 16

約数和(自身を含む): 46070280

約数和(自身を除く): 25594640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 511891, 1023782, 2047564, 2559455, 4095128, 5118910, 10237820, 20475640]

約数ペア:

[(1, 20475640), (2, 10237820), (4, 5118910), (5, 4095128), (8, 2559455), (10, 2047564), (20, 1023782), (40, 511891)]