80818420

素因数分解:

$2^2\times 5^1\times {\mathrm{4040921}}^1$

素因数の和:4040930

約数の個数: 12

約数和(自身を含む): 169718724

約数和(自身を除く): 88900304

約数列:

[1, 2, 4, 5, 10, 20, 4040921, 8081842, 16163684, 20204605, 40409210, 80818420]

約数ペア:

[(1, 80818420), (2, 40409210), (4, 20204605), (5, 16163684), (10, 8081842), (20, 4040921)]