19539890

素因数分解:

$2^1\times 5^1\times {\mathrm{439}}^1\times {\mathrm{4451}}^1$

素因数の和:4897

約数の個数: 16

約数和(自身を含む): 35259840

約数和(自身を除く): 15719950

約数列:

[1, 2, 5, 10, 439, 878, 2195, 4390, 4451, 8902, 22255, 44510, 1953989, 3907978, 9769945, 19539890]

約数ペア:

[(1, 19539890), (2, 9769945), (5, 3907978), (10, 1953989), (439, 44510), (878, 22255), (2195, 8902), (4390, 4451)]