81147580

素因数分解:

$2^2\times 5^1\times {\mathrm{4057379}}^1$

素因数の和:4057388

約数の個数: 12

約数和(自身を含む): 170409960

約数和(自身を除く): 89262380

約数列:

[1, 2, 4, 5, 10, 20, 4057379, 8114758, 16229516, 20286895, 40573790, 81147580]

約数ペア:

[(1, 81147580), (2, 40573790), (4, 20286895), (5, 16229516), (10, 8114758), (20, 4057379)]