19978621

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{90401}}^1$

素因数の和:90431

約数の個数: 8

約数和(自身を含む): 22781304

約数和(自身を除く): 2802683

約数列:

[1, 13, 17, 221, 90401, 1175213, 1536817, 19978621]

約数ペア:

[(1, 19978621), (13, 1536817), (17, 1175213), (221, 90401)]