18728860

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{6737}}^1$

素因数の和:6885

約数の個数: 24

約数和(自身を含む): 39619440

約数和(自身を除く): 20890580

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 6737, 13474, 26948, 33685, 67370, 134740, 936443, 1872886, 3745772, 4682215, 9364430, 18728860]

約数ペア:

[(1, 18728860), (2, 9364430), (4, 4682215), (5, 3745772), (10, 1872886), (20, 936443), (139, 134740), (278, 67370), (556, 33685), (695, 26948), (1390, 13474), (2780, 6737)]