20388545

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{199}}^1\times {\mathrm{661}}^1$

素因数の和:896

約数の個数: 16

約数和(自身を含む): 25420800

約数和(自身を除く): 5032255

約数列:

[1, 5, 31, 155, 199, 661, 995, 3305, 6169, 20491, 30845, 102455, 131539, 657695, 4077709, 20388545]

約数ペア:

[(1, 20388545), (5, 4077709), (31, 657695), (155, 131539), (199, 102455), (661, 30845), (995, 20491), (3305, 6169)]