19961381

素因数分解:

${\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{641}}^1$

素因数の和:820

約数の個数: 16

約数和(自身を含む): 23112000

約数和(自身を除く): 3150619

約数列:

[1, 11, 19, 149, 209, 641, 1639, 2831, 7051, 12179, 31141, 95509, 133969, 1050599, 1814671, 19961381]

約数ペア:

[(1, 19961381), (11, 1814671), (19, 1050599), (149, 133969), (209, 95509), (641, 31141), (1639, 12179), (2831, 7051)]