12804900380

素因数分解:

$2^2\times 5^1\times {\mathrm{640245019}}^1$

素因数の和:640245028

約数の個数: 12

約数和(自身を含む): 26890290840

約数和(自身を除く): 14085390460

約数列:

[1, 2, 4, 5, 10, 20, 640245019, 1280490038, 2560980076, 3201225095, 6402450190, 12804900380]

約数ペア:

[(1, 12804900380), (2, 6402450190), (4, 3201225095), (5, 2560980076), (10, 1280490038), (20, 640245019)]