19905940

素因数分解:

$2^2\times 5^1\times {\mathrm{947}}^1\times {\mathrm{1051}}^1$

素因数の和:2007

約数の個数: 24

約数和(自身を含む): 41886432

約数和(自身を除く): 21980492

約数列:

[1, 2, 4, 5, 10, 20, 947, 1051, 1894, 2102, 3788, 4204, 4735, 5255, 9470, 10510, 18940, 21020, 995297, 1990594, 3981188, 4976485, 9952970, 19905940]

約数ペア:

[(1, 19905940), (2, 9952970), (4, 4976485), (5, 3981188), (10, 1990594), (20, 995297), (947, 21020), (1051, 18940), (1894, 10510), (2102, 9470), (3788, 5255), (4204, 4735)]