20515640

素因数分解:

$2^3\times 5^1\times {\mathrm{512891}}^1$

素因数の和:512902

約数の個数: 16

約数和(自身を含む): 46160280

約数和(自身を除く): 25644640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 512891, 1025782, 2051564, 2564455, 4103128, 5128910, 10257820, 20515640]

約数ペア:

[(1, 20515640), (2, 10257820), (4, 5128910), (5, 4103128), (8, 2564455), (10, 2051564), (20, 1025782), (40, 512891)]