21920248

素因数分解:

$2^3\times 7^2\times {\mathrm{199}}^1\times {\mathrm{281}}^1$

素因数の和:500

約数の個数: 48

約数和(自身を含む): 48222000

約数和(自身を除く): 26301752

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 196, 199, 281, 392, 398, 562, 796, 1124, 1393, 1592, 1967, 2248, 2786, 3934, 5572, 7868, 9751, 11144, 13769, 15736, 19502, 27538, 39004, 55076, 55919, 78008, 110152, 111838, 223676, 391433, 447352, 782866, 1565732, 2740031, 3131464, 5480062, 10960124, 21920248]

約数ペア:

[(1, 21920248), (2, 10960124), (4, 5480062), (7, 3131464), (8, 2740031), (14, 1565732), (28, 782866), (49, 447352), (56, 391433), (98, 223676), (196, 111838), (199, 110152), (281, 78008), (392, 55919), (398, 55076), (562, 39004), (796, 27538), (1124, 19502), (1393, 15736), (1592, 13769), (1967, 11144), (2248, 9751), (2786, 7868), (3934, 5572)]