64292920

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{197}}^1\times {\mathrm{199}}^1$

素因数の和:448

約数の個数: 64

約数和(自身を含む): 149688000

約数和(自身を除く): 85395080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 197, 199, 205, 328, 394, 398, 410, 788, 796, 820, 985, 995, 1576, 1592, 1640, 1970, 1990, 3940, 3980, 7880, 7960, 8077, 8159, 16154, 16318, 32308, 32636, 39203, 40385, 40795, 64616, 65272, 78406, 80770, 81590, 156812, 161540, 163180, 196015, 313624, 323080, 326360, 392030, 784060, 1568120, 1607323, 3214646, 6429292, 8036615, 12858584, 16073230, 32146460, 64292920]

約数ペア:

[(1, 64292920), (2, 32146460), (4, 16073230), (5, 12858584), (8, 8036615), (10, 6429292), (20, 3214646), (40, 1607323), (41, 1568120), (82, 784060), (164, 392030), (197, 326360), (199, 323080), (205, 313624), (328, 196015), (394, 163180), (398, 161540), (410, 156812), (788, 81590), (796, 80770), (820, 78406), (985, 65272), (995, 64616), (1576, 40795), (1592, 40385), (1640, 39203), (1970, 32636), (1990, 32308), (3940, 16318), (3980, 16154), (7880, 8159), (7960, 8077)]