20391788

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{1709}}^1$

素因数の和:1889

約数の個数: 24

約数和(自身を含む): 37825200

約数和(自身を除く): 17433412

約数列:

[1, 2, 4, 19, 38, 76, 157, 314, 628, 1709, 2983, 3418, 5966, 6836, 11932, 32471, 64942, 129884, 268313, 536626, 1073252, 5097947, 10195894, 20391788]

約数ペア:

[(1, 20391788), (2, 10195894), (4, 5097947), (19, 1073252), (38, 536626), (76, 268313), (157, 129884), (314, 64942), (628, 32471), (1709, 11932), (2983, 6836), (3418, 5966)]