20669739

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{257}}^1$

素因数の和:379

約数の個数: 32

約数和(自身を含む): 31207680

約数和(自身を除く): 10537941

約数列:

[1, 3, 17, 19, 51, 57, 83, 249, 257, 323, 771, 969, 1411, 1577, 4233, 4369, 4731, 4883, 13107, 14649, 21331, 26809, 63993, 80427, 83011, 249033, 362627, 405289, 1087881, 1215867, 6889913, 20669739]

約数ペア:

[(1, 20669739), (3, 6889913), (17, 1215867), (19, 1087881), (51, 405289), (57, 362627), (83, 249033), (249, 83011), (257, 80427), (323, 63993), (771, 26809), (969, 21331), (1411, 14649), (1577, 13107), (4233, 4883), (4369, 4731)]