21128492

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{379}}^1$

素因数の和:582

約数の個数: 48

約数和(自身を含む): 46475520

約数和(自身を除く): 25347028

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 154, 181, 308, 362, 379, 724, 758, 1267, 1516, 1991, 2534, 2653, 3982, 4169, 5068, 5306, 7964, 8338, 10612, 13937, 16676, 27874, 29183, 55748, 58366, 68599, 116732, 137198, 274396, 480193, 754589, 960386, 1509178, 1920772, 3018356, 5282123, 10564246, 21128492]

約数ペア:

[(1, 21128492), (2, 10564246), (4, 5282123), (7, 3018356), (11, 1920772), (14, 1509178), (22, 960386), (28, 754589), (44, 480193), (77, 274396), (154, 137198), (181, 116732), (308, 68599), (362, 58366), (379, 55748), (724, 29183), (758, 27874), (1267, 16676), (1516, 13937), (1991, 10612), (2534, 8338), (2653, 7964), (3982, 5306), (4169, 5068)]