19987659

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{193}}^1\times {\mathrm{311}}^1$

素因数の和:547

約数の個数: 24

約数和(自身を含む): 29900832

約数和(自身を除く): 9913173

約数列:

[1, 3, 9, 37, 111, 193, 311, 333, 579, 933, 1737, 2799, 7141, 11507, 21423, 34521, 60023, 64269, 103563, 180069, 540207, 2220851, 6662553, 19987659]

約数ペア:

[(1, 19987659), (3, 6662553), (9, 2220851), (37, 540207), (111, 180069), (193, 103563), (311, 64269), (333, 60023), (579, 34521), (933, 21423), (1737, 11507), (2799, 7141)]