19935747

素因数分解:

$3^3\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{257}}^1$

素因数の和:309

約数の個数: 48

約数和(自身を含む): 33994080

約数和(自身を除く): 14058333

約数列:

[1, 3, 9, 13, 17, 27, 39, 51, 117, 153, 169, 221, 257, 351, 459, 507, 663, 771, 1521, 1989, 2313, 2873, 3341, 4369, 4563, 5967, 6939, 8619, 10023, 13107, 25857, 30069, 39321, 43433, 56797, 77571, 90207, 117963, 130299, 170391, 390897, 511173, 738361, 1172691, 1533519, 2215083, 6645249, 19935747]

約数ペア:

[(1, 19935747), (3, 6645249), (9, 2215083), (13, 1533519), (17, 1172691), (27, 738361), (39, 511173), (51, 390897), (117, 170391), (153, 130299), (169, 117963), (221, 90207), (257, 77571), (351, 56797), (459, 43433), (507, 39321), (663, 30069), (771, 25857), (1521, 13107), (1989, 10023), (2313, 8619), (2873, 6939), (3341, 5967), (4369, 4563)]