20988945

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{10847}}^1$

素因数の和:10901

約数の個数: 24

約数和(自身を含む): 37230336

約数和(自身を除く): 16241391

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 10847, 32541, 54235, 97623, 162705, 466421, 488115, 1399263, 2332105, 4197789, 6996315, 20988945]

約数ペア:

[(1, 20988945), (3, 6996315), (5, 4197789), (9, 2332105), (15, 1399263), (43, 488115), (45, 466421), (129, 162705), (215, 97623), (387, 54235), (645, 32541), (1935, 10847)]