20554785

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{277}}^1$

素因数の和:402

約数の個数: 48

約数和(自身を含む): 38250576

約数和(自身を除く): 17695791

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 97, 153, 255, 277, 291, 485, 765, 831, 873, 1385, 1455, 1649, 2493, 4155, 4365, 4709, 4947, 8245, 12465, 14127, 14841, 23545, 24735, 26869, 42381, 70635, 74205, 80607, 134345, 211905, 241821, 403035, 456773, 1209105, 1370319, 2283865, 4110957, 6851595, 20554785]

約数ペア:

[(1, 20554785), (3, 6851595), (5, 4110957), (9, 2283865), (15, 1370319), (17, 1209105), (45, 456773), (51, 403035), (85, 241821), (97, 211905), (153, 134345), (255, 80607), (277, 74205), (291, 70635), (485, 42381), (765, 26869), (831, 24735), (873, 23545), (1385, 14841), (1455, 14127), (1649, 12465), (2493, 8245), (4155, 4947), (4365, 4709)]