19980961

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19961}}^1$

素因数の和:19992

約数の個数: 16

約数和(自身を含む): 26828928

約数和(自身を除く): 6847967

約数列:

[1, 7, 11, 13, 77, 91, 143, 1001, 19961, 139727, 219571, 259493, 1536997, 1816451, 2854423, 19980961]

約数ペア:

[(1, 19980961), (7, 2854423), (11, 1816451), (13, 1536997), (77, 259493), (91, 219571), (143, 139727), (1001, 19961)]