21415849

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{421}}^1$

素因数の和:497

約数の個数: 24

約数和(自身を含む): 27183552

約数和(自身を除く): 5767703

約数列:

[1, 7, 13, 43, 91, 169, 301, 421, 559, 1183, 2947, 3913, 5473, 7267, 18103, 38311, 50869, 71149, 126721, 235339, 498043, 1647373, 3059407, 21415849]

約数ペア:

[(1, 21415849), (7, 3059407), (13, 1647373), (43, 498043), (91, 235339), (169, 126721), (301, 71149), (421, 50869), (559, 38311), (1183, 18103), (2947, 7267), (3913, 5473)]