19888169

素因数分解:

$7^3\times {\mathrm{23}}^1\times {\mathrm{2521}}^1$

素因数の和:2565

約数の個数: 16

約数和(自身を含む): 24211200

約数和(自身を除く): 4323031

約数列:

[1, 7, 23, 49, 161, 343, 1127, 2521, 7889, 17647, 57983, 123529, 405881, 864703, 2841167, 19888169]

約数ペア:

[(1, 19888169), (7, 2841167), (23, 864703), (49, 405881), (161, 123529), (343, 57983), (1127, 17647), (2521, 7889)]