19965940

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{26981}}^1$

素因数の和:27027

約数の個数: 24

約数和(自身を含む): 43063272

約数和(自身を除く): 23097332

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 148, 185, 370, 740, 26981, 53962, 107924, 134905, 269810, 539620, 998297, 1996594, 3993188, 4991485, 9982970, 19965940]

約数ペア:

[(1, 19965940), (2, 9982970), (4, 4991485), (5, 3993188), (10, 1996594), (20, 998297), (37, 539620), (74, 269810), (148, 134905), (185, 107924), (370, 53962), (740, 26981)]