128492500

素因数分解:

$2^2\times 5^4\times {\mathrm{103}}^1\times {\mathrm{499}}^1$

素因数の和:626

約数の個数: 60

約数和(自身を含む): 284284000

約数和(自身を除く): 155791500

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 103, 125, 206, 250, 412, 499, 500, 515, 625, 998, 1030, 1250, 1996, 2060, 2495, 2500, 2575, 4990, 5150, 9980, 10300, 12475, 12875, 24950, 25750, 49900, 51397, 51500, 62375, 64375, 102794, 124750, 128750, 205588, 249500, 256985, 257500, 311875, 513970, 623750, 1027940, 1247500, 1284925, 2569850, 5139700, 6424625, 12849250, 25698500, 32123125, 64246250, 128492500]

約数ペア:

[(1, 128492500), (2, 64246250), (4, 32123125), (5, 25698500), (10, 12849250), (20, 6424625), (25, 5139700), (50, 2569850), (100, 1284925), (103, 1247500), (125, 1027940), (206, 623750), (250, 513970), (412, 311875), (499, 257500), (500, 256985), (515, 249500), (625, 205588), (998, 128750), (1030, 124750), (1250, 102794), (1996, 64375), (2060, 62375), (2495, 51500), (2500, 51397), (2575, 49900), (4990, 25750), (5150, 24950), (9980, 12875), (10300, 12475)]