21547919

素因数分解:

${\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{139}}^1\times {\mathrm{199}}^1$

素因数の和:398

約数の個数: 16

約数和(自身を含む): 23520000

約数和(自身を除く): 1972081

約数列:

[1, 19, 41, 139, 199, 779, 2641, 3781, 5699, 8159, 27661, 108281, 155021, 525559, 1134101, 21547919]

約数ペア:

[(1, 21547919), (19, 1134101), (41, 525559), (139, 155021), (199, 108281), (779, 27661), (2641, 8159), (3781, 5699)]