21031276

素因数分解:

$2^2\times 7^1\times {\mathrm{691}}^1\times {\mathrm{1087}}^1$

素因数の和:1789

約数の個数: 24

約数和(自身を含む): 42162176

約数和(自身を除く): 21130900

約数列:

[1, 2, 4, 7, 14, 28, 691, 1087, 1382, 2174, 2764, 4348, 4837, 7609, 9674, 15218, 19348, 30436, 751117, 1502234, 3004468, 5257819, 10515638, 21031276]

約数ペア:

[(1, 21031276), (2, 10515638), (4, 5257819), (7, 3004468), (14, 1502234), (28, 751117), (691, 30436), (1087, 19348), (1382, 15218), (2174, 9674), (2764, 7609), (4348, 4837)]