21000213290

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{967}}^1\times {\mathrm{1559}}^1$

素因数の和:2739

約数の個数: 64

約数和(自身を含む): 43490304000

約数和(自身を除く): 22490090710

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 199, 398, 967, 995, 1393, 1559, 1934, 1990, 2786, 3118, 4835, 6769, 6965, 7795, 9670, 10913, 13538, 13930, 15590, 21826, 33845, 54565, 67690, 109130, 192433, 310241, 384866, 620482, 962165, 1347031, 1507553, 1551205, 1924330, 2171687, 2694062, 3015106, 3102410, 4343374, 6735155, 7537765, 10552871, 10858435, 13470310, 15075530, 21105742, 21716870, 52764355, 105528710, 300003047, 600006094, 1500015235, 2100021329, 3000030470, 4200042658, 10500106645, 21000213290]

約数ペア:

[(1, 21000213290), (2, 10500106645), (5, 4200042658), (7, 3000030470), (10, 2100021329), (14, 1500015235), (35, 600006094), (70, 300003047), (199, 105528710), (398, 52764355), (967, 21716870), (995, 21105742), (1393, 15075530), (1559, 13470310), (1934, 10858435), (1990, 10552871), (2786, 7537765), (3118, 6735155), (4835, 4343374), (6769, 3102410), (6965, 3015106), (7795, 2694062), (9670, 2171687), (10913, 1924330), (13538, 1551205), (13930, 1507553), (15590, 1347031), (21826, 962165), (33845, 620482), (54565, 384866), (67690, 310241), (109130, 192433)]