20019805

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{479}}^1\times {\mathrm{643}}^1$

素因数の和:1140

約数の個数: 16

約数和(自身を含む): 25966080

約数和(自身を除く): 5946275

約数列:

[1, 5, 13, 65, 479, 643, 2395, 3215, 6227, 8359, 31135, 41795, 307997, 1539985, 4003961, 20019805]

約数ペア:

[(1, 20019805), (5, 4003961), (13, 1539985), (65, 307997), (479, 41795), (643, 31135), (2395, 8359), (3215, 6227)]