12781321

素因数分解:

$7^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{733}}^1$

素因数の和:840

約数の個数: 16

約数和(自身を含む): 15220224

約数和(自身を除く): 2438903

約数列:

[1, 7, 47, 53, 329, 371, 733, 2491, 5131, 17437, 34451, 38849, 241157, 271943, 1825903, 12781321]

約数ペア:

[(1, 12781321), (7, 1825903), (47, 271943), (53, 241157), (329, 38849), (371, 34451), (733, 17437), (2491, 5131)]