20638863

素因数分解:

$3^2\times 7^1\times {\mathrm{83}}^1\times {\mathrm{3947}}^1$

素因数の和:4043

約数の個数: 24

約数和(自身を含む): 34489728

約数和(自身を除く): 13850865

約数列:

[1, 3, 7, 9, 21, 63, 83, 249, 581, 747, 1743, 3947, 5229, 11841, 27629, 35523, 82887, 248661, 327601, 982803, 2293207, 2948409, 6879621, 20638863]

約数ペア:

[(1, 20638863), (3, 6879621), (7, 2948409), (9, 2293207), (21, 982803), (63, 327601), (83, 248661), (249, 82887), (581, 35523), (747, 27629), (1743, 11841), (3947, 5229)]