20690380

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9491}}^1$

素因数の和:9609

約数の個数: 24

約数和(自身を含む): 43853040

約数和(自身を除く): 23162660

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9491, 18982, 37964, 47455, 94910, 189820, 1034519, 2069038, 4138076, 5172595, 10345190, 20690380]

約数ペア:

[(1, 20690380), (2, 10345190), (4, 5172595), (5, 4138076), (10, 2069038), (20, 1034519), (109, 189820), (218, 94910), (436, 47455), (545, 37964), (1090, 18982), (2180, 9491)]