20403887

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{1279}}^1$

素因数の和:1382

約数の個数: 16

約数和(自身を含む): 24330240

約数和(自身を除く): 3926353

約数列:

[1, 7, 43, 53, 301, 371, 1279, 2279, 8953, 15953, 54997, 67787, 384979, 474509, 2914841, 20403887]

約数ペア:

[(1, 20403887), (7, 2914841), (43, 474509), (53, 384979), (301, 67787), (371, 54997), (1279, 15953), (2279, 8953)]