20873671

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{131}}^1$

素因数の和:271

約数の個数: 32

約数和(自身を含む): 27675648

約数和(自身を除く): 6801977

約数列:

[1, 7, 13, 17, 91, 103, 119, 131, 221, 721, 917, 1339, 1547, 1703, 1751, 2227, 9373, 11921, 12257, 13493, 15589, 22763, 28951, 94451, 159341, 175409, 202657, 229381, 1227863, 1605667, 2981953, 20873671]

約数ペア:

[(1, 20873671), (7, 2981953), (13, 1605667), (17, 1227863), (91, 229381), (103, 202657), (119, 175409), (131, 159341), (221, 94451), (721, 28951), (917, 22763), (1339, 15589), (1547, 13493), (1703, 12257), (1751, 11921), (2227, 9373)]