21185540

素因数分解:

$2^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{5323}}^1$

素因数の和:5531

約数の個数: 24

約数和(自身を含む): 44721600

約数和(自身を除く): 23536060

約数列:

[1, 2, 4, 5, 10, 20, 199, 398, 796, 995, 1990, 3980, 5323, 10646, 21292, 26615, 53230, 106460, 1059277, 2118554, 4237108, 5296385, 10592770, 21185540]

約数ペア:

[(1, 21185540), (2, 10592770), (4, 5296385), (5, 4237108), (10, 2118554), (20, 1059277), (199, 106460), (398, 53230), (796, 26615), (995, 21292), (1990, 10646), (3980, 5323)]