20787788

素因数分解:

$2^2\times 7^1\times {\mathrm{683}}^1\times {\mathrm{1087}}^1$

素因数の和:1781

約数の個数: 24

約数和(自身を含む): 41674752

約数和(自身を除く): 20886964

約数列:

[1, 2, 4, 7, 14, 28, 683, 1087, 1366, 2174, 2732, 4348, 4781, 7609, 9562, 15218, 19124, 30436, 742421, 1484842, 2969684, 5196947, 10393894, 20787788]

約数ペア:

[(1, 20787788), (2, 10393894), (4, 5196947), (7, 2969684), (14, 1484842), (28, 742421), (683, 30436), (1087, 19124), (1366, 15218), (2174, 9562), (2732, 7609), (4348, 4781)]