20800400

素因数分解:

$2^4\times 5^2\times {\mathrm{149}}^1\times {\mathrm{349}}^1$

素因数の和:516

約数の個数: 60

約数和(自身を含む): 50452500

約数和(自身を除く): 29652100

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 149, 200, 298, 349, 400, 596, 698, 745, 1192, 1396, 1490, 1745, 2384, 2792, 2980, 3490, 3725, 5584, 5960, 6980, 7450, 8725, 11920, 13960, 14900, 17450, 27920, 29800, 34900, 52001, 59600, 69800, 104002, 139600, 208004, 260005, 416008, 520010, 832016, 1040020, 1300025, 2080040, 2600050, 4160080, 5200100, 10400200, 20800400]

約数ペア:

[(1, 20800400), (2, 10400200), (4, 5200100), (5, 4160080), (8, 2600050), (10, 2080040), (16, 1300025), (20, 1040020), (25, 832016), (40, 520010), (50, 416008), (80, 260005), (100, 208004), (149, 139600), (200, 104002), (298, 69800), (349, 59600), (400, 52001), (596, 34900), (698, 29800), (745, 27920), (1192, 17450), (1396, 14900), (1490, 13960), (1745, 11920), (2384, 8725), (2792, 7450), (2980, 6980), (3490, 5960), (3725, 5584)]