18953755

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{199}}^1\times {\mathrm{443}}^1$

素因数の和:690

約数の個数: 16

約数和(自身を含む): 23443200

約数和(自身を除く): 4489445

約数列:

[1, 5, 43, 199, 215, 443, 995, 2215, 8557, 19049, 42785, 88157, 95245, 440785, 3790751, 18953755]

約数ペア:

[(1, 18953755), (5, 3790751), (43, 440785), (199, 95245), (215, 88157), (443, 42785), (995, 19049), (2215, 8557)]