19839280

素因数分解:

$2^4\times 5^1\times {\mathrm{247991}}^1$

素因数の和:248004

約数の個数: 20

約数和(自身を含む): 46126512

約数和(自身を除く): 26287232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 247991, 495982, 991964, 1239955, 1983928, 2479910, 3967856, 4959820, 9919640, 19839280]

約数ペア:

[(1, 19839280), (2, 9919640), (4, 4959820), (5, 3967856), (8, 2479910), (10, 1983928), (16, 1239955), (20, 991964), (40, 495982), (80, 247991)]