20709689

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1217}}^1$

素因数の和:1265

約数の個数: 32

約数和(自身を含む): 29465856

約数和(自身を除く): 8756167

約数列:

[1, 7, 11, 13, 17, 77, 91, 119, 143, 187, 221, 1001, 1217, 1309, 1547, 2431, 8519, 13387, 15821, 17017, 20689, 93709, 110747, 144823, 174031, 227579, 268957, 1218217, 1593053, 1882699, 2958527, 20709689]

約数ペア:

[(1, 20709689), (7, 2958527), (11, 1882699), (13, 1593053), (17, 1218217), (77, 268957), (91, 227579), (119, 174031), (143, 144823), (187, 110747), (221, 93709), (1001, 20689), (1217, 17017), (1309, 15821), (1547, 13387), (2431, 8519)]