20654840

素因数分解:

$2^3\times 5^1\times {\mathrm{516371}}^1$

素因数の和:516382

約数の個数: 16

約数和(自身を含む): 46473480

約数和(自身を除く): 25818640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 516371, 1032742, 2065484, 2581855, 4130968, 5163710, 10327420, 20654840]

約数ペア:

[(1, 20654840), (2, 10327420), (4, 5163710), (5, 4130968), (8, 2581855), (10, 2065484), (20, 1032742), (40, 516371)]