20290040

素因数分解:

$2^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{2549}}^1$

素因数の和:2759

約数の個数: 32

約数和(自身を含む): 45900000

約数和(自身を除く): 25609960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199, 398, 796, 995, 1592, 1990, 2549, 3980, 5098, 7960, 10196, 12745, 20392, 25490, 50980, 101960, 507251, 1014502, 2029004, 2536255, 4058008, 5072510, 10145020, 20290040]

約数ペア:

[(1, 20290040), (2, 10145020), (4, 5072510), (5, 4058008), (8, 2536255), (10, 2029004), (20, 1014502), (40, 507251), (199, 101960), (398, 50980), (796, 25490), (995, 20392), (1592, 12745), (1990, 10196), (2549, 7960), (3980, 5098)]