21253954

素因数分解:

$2^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{4663}}^1$

素因数の和:4761

約数の個数: 16

約数和(自身を含む): 33244992

約数和(自身を除く): 11991038

約数列:

[1, 2, 43, 53, 86, 106, 2279, 4558, 4663, 9326, 200509, 247139, 401018, 494278, 10626977, 21253954]

約数ペア:

[(1, 21253954), (2, 10626977), (43, 494278), (53, 401018), (86, 247139), (106, 200509), (2279, 9326), (4558, 4663)]