19515915

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{263}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 36324288

約数和(自身を除く): 16808373

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 97, 153, 255, 263, 291, 485, 765, 789, 873, 1315, 1455, 1649, 2367, 3945, 4365, 4471, 4947, 8245, 11835, 13413, 14841, 22355, 24735, 25511, 40239, 67065, 74205, 76533, 127555, 201195, 229599, 382665, 433687, 1147995, 1301061, 2168435, 3903183, 6505305, 19515915]

約数ペア:

[(1, 19515915), (3, 6505305), (5, 3903183), (9, 2168435), (15, 1301061), (17, 1147995), (45, 433687), (51, 382665), (85, 229599), (97, 201195), (153, 127555), (255, 76533), (263, 74205), (291, 67065), (485, 40239), (765, 25511), (789, 24735), (873, 22355), (1315, 14841), (1455, 13413), (1649, 11835), (2367, 8245), (3945, 4947), (4365, 4471)]