19857985

素因数分解:

$5^1\times 7^3\times {\mathrm{11579}}^1$

素因数の和:11605

約数の個数: 16

約数和(自身を含む): 27792000

約数和(自身を除く): 7934015

約数列:

[1, 5, 7, 35, 49, 245, 343, 1715, 11579, 57895, 81053, 405265, 567371, 2836855, 3971597, 19857985]

約数ペア:

[(1, 19857985), (5, 3971597), (7, 2836855), (35, 567371), (49, 405265), (245, 81053), (343, 57895), (1715, 11579)]