20128750

素因数分解:

$2^1\times 5^4\times {\mathrm{16103}}^1$

素因数の和:16125

約数の個数: 20

約数和(自身を含む): 37731672

約数和(自身を除く): 17602922

約数列:

[1, 2, 5, 10, 25, 50, 125, 250, 625, 1250, 16103, 32206, 80515, 161030, 402575, 805150, 2012875, 4025750, 10064375, 20128750]

約数ペア:

[(1, 20128750), (2, 10064375), (5, 4025750), (10, 2012875), (25, 805150), (50, 402575), (125, 161030), (250, 80515), (625, 32206), (1250, 16103)]