20517993

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{127}}^1\times {\mathrm{619}}^1$

素因数の和:781

約数の個数: 24

約数和(自身を含む): 30950400

約数和(自身を除く): 10432407

約数列:

[1, 3, 9, 29, 87, 127, 261, 381, 619, 1143, 1857, 3683, 5571, 11049, 17951, 33147, 53853, 78613, 161559, 235839, 707517, 2279777, 6839331, 20517993]

約数ペア:

[(1, 20517993), (3, 6839331), (9, 2279777), (29, 707517), (87, 235839), (127, 161559), (261, 78613), (381, 53853), (619, 33147), (1143, 17951), (1857, 11049), (3683, 5571)]