18728980

素因数分解:

$2^2\times 5^1\times {\mathrm{173}}^1\times {\mathrm{5413}}^1$

素因数の和:5595

約数の個数: 24

約数和(自身を含む): 39565512

約数和(自身を除く): 20836532

約数列:

[1, 2, 4, 5, 10, 20, 173, 346, 692, 865, 1730, 3460, 5413, 10826, 21652, 27065, 54130, 108260, 936449, 1872898, 3745796, 4682245, 9364490, 18728980]

約数ペア:

[(1, 18728980), (2, 9364490), (4, 4682245), (5, 3745796), (10, 1872898), (20, 936449), (173, 108260), (346, 54130), (692, 27065), (865, 21652), (1730, 10826), (3460, 5413)]