81156280

素因数分解:

$2^3\times 5^1\times {\mathrm{2028907}}^1$

素因数の和:2028918

約数の個数: 16

約数和(自身を含む): 182601720

約数和(自身を除く): 101445440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2028907, 4057814, 8115628, 10144535, 16231256, 20289070, 40578140, 81156280]

約数ペア:

[(1, 81156280), (2, 40578140), (4, 20289070), (5, 16231256), (8, 10144535), (10, 8115628), (20, 4057814), (40, 2028907)]