81986919

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{3877}}^1$

素因数の和:3959

約数の個数: 32

約数和(自身を含む): 134023680

約数和(自身を除く): 52036761

約数列:

[1, 3, 7, 19, 21, 53, 57, 133, 159, 371, 399, 1007, 1113, 3021, 3877, 7049, 11631, 21147, 27139, 73663, 81417, 205481, 220989, 515641, 616443, 1438367, 1546923, 3904139, 4315101, 11712417, 27328973, 81986919]

約数ペア:

[(1, 81986919), (3, 27328973), (7, 11712417), (19, 4315101), (21, 3904139), (53, 1546923), (57, 1438367), (133, 616443), (159, 515641), (371, 220989), (399, 205481), (1007, 81417), (1113, 73663), (3021, 27139), (3877, 21147), (7049, 11631)]