21078644

素因数分解:

$2^2\times {\mathrm{641}}^1\times {\mathrm{8221}}^1$

素因数の和:8866

約数の個数: 12

約数和(自身を含む): 36949668

約数和(自身を除く): 15871024

約数列:

[1, 2, 4, 641, 1282, 2564, 8221, 16442, 32884, 5269661, 10539322, 21078644]

約数ペア:

[(1, 21078644), (2, 10539322), (4, 5269661), (641, 32884), (1282, 16442), (2564, 8221)]