18777640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{337}}^1$

素因数の和:554

約数の個数: 64

約数和(自身を含む): 48672000

約数和(自身を除く): 29894360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 199, 280, 337, 398, 674, 796, 995, 1348, 1393, 1592, 1685, 1990, 2359, 2696, 2786, 3370, 3980, 4718, 5572, 6740, 6965, 7960, 9436, 11144, 11795, 13480, 13930, 18872, 23590, 27860, 47180, 55720, 67063, 94360, 134126, 268252, 335315, 469441, 536504, 670630, 938882, 1341260, 1877764, 2347205, 2682520, 3755528, 4694410, 9388820, 18777640]

約数ペア:

[(1, 18777640), (2, 9388820), (4, 4694410), (5, 3755528), (7, 2682520), (8, 2347205), (10, 1877764), (14, 1341260), (20, 938882), (28, 670630), (35, 536504), (40, 469441), (56, 335315), (70, 268252), (140, 134126), (199, 94360), (280, 67063), (337, 55720), (398, 47180), (674, 27860), (796, 23590), (995, 18872), (1348, 13930), (1393, 13480), (1592, 11795), (1685, 11144), (1990, 9436), (2359, 7960), (2696, 6965), (2786, 6740), (3370, 5572), (3980, 4718)]