18720268

素因数分解:

$2^2\times 7^1\times {\mathrm{668581}}^1$

素因数の和:668592

約数の個数: 12

約数和(自身を含む): 37440592

約数和(自身を除く): 18720324

約数列:

[1, 2, 4, 7, 14, 28, 668581, 1337162, 2674324, 4680067, 9360134, 18720268]

約数ペア:

[(1, 18720268), (2, 9360134), (4, 4680067), (7, 2674324), (14, 1337162), (28, 668581)]