21554840

素因数分解:

$2^3\times 5^1\times {\mathrm{538871}}^1$

素因数の和:538882

約数の個数: 16

約数和(自身を含む): 48498480

約数和(自身を除く): 26943640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 538871, 1077742, 2155484, 2694355, 4310968, 5388710, 10777420, 21554840]

約数ペア:

[(1, 21554840), (2, 10777420), (4, 5388710), (5, 4310968), (8, 2694355), (10, 2155484), (20, 1077742), (40, 538871)]