19820720

素因数分解:

$2^4\times 5^1\times {\mathrm{247759}}^1$

素因数の和:247772

約数の個数: 20

約数和(自身を含む): 46083360

約数和(自身を除く): 26262640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 247759, 495518, 991036, 1238795, 1982072, 2477590, 3964144, 4955180, 9910360, 19820720]

約数ペア:

[(1, 19820720), (2, 9910360), (4, 4955180), (5, 3964144), (8, 2477590), (10, 1982072), (16, 1238795), (20, 991036), (40, 495518), (80, 247759)]