19990321

素因数分解:

${\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{67}}^1\times {\mathrm{389}}^1$

素因数の和:528

約数の個数: 16

約数和(自身を含む): 22276800

約数和(自身を除く): 2286479

約数列:

[1, 13, 59, 67, 389, 767, 871, 3953, 5057, 22951, 26063, 51389, 298363, 338819, 1537717, 19990321]

約数ペア:

[(1, 19990321), (13, 1537717), (59, 338819), (67, 298363), (389, 51389), (767, 26063), (871, 22951), (3953, 5057)]