18720212

素因数分解:

$2^2\times 7^1\times {\mathrm{668579}}^1$

素因数の和:668590

約数の個数: 12

約数和(自身を含む): 37440480

約数和(自身を除く): 18720268

約数列:

[1, 2, 4, 7, 14, 28, 668579, 1337158, 2674316, 4680053, 9360106, 18720212]

約数ペア:

[(1, 18720212), (2, 9360106), (4, 4680053), (7, 2674316), (14, 1337158), (28, 668579)]