20956940

素因数分解:

$2^2\times 5^1\times {\mathrm{997}}^1\times {\mathrm{1051}}^1$

素因数の和:2057

約数の個数: 24

約数和(自身を含む): 44095632

約数和(自身を除く): 23138692

約数列:

[1, 2, 4, 5, 10, 20, 997, 1051, 1994, 2102, 3988, 4204, 4985, 5255, 9970, 10510, 19940, 21020, 1047847, 2095694, 4191388, 5239235, 10478470, 20956940]

約数ペア:

[(1, 20956940), (2, 10478470), (4, 5239235), (5, 4191388), (10, 2095694), (20, 1047847), (997, 21020), (1051, 19940), (1994, 10510), (2102, 9970), (3988, 5255), (4204, 4985)]