261995440

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{2351}}^1$

素因数の和:2570

約数の個数: 80

約数和(自身を含む): 699955200

約数和(自身を除く): 437959760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 199, 280, 398, 560, 796, 995, 1393, 1592, 1990, 2351, 2786, 3184, 3980, 4702, 5572, 6965, 7960, 9404, 11144, 11755, 13930, 15920, 16457, 18808, 22288, 23510, 27860, 32914, 37616, 47020, 55720, 65828, 82285, 94040, 111440, 131656, 164570, 188080, 263312, 329140, 467849, 658280, 935698, 1316560, 1871396, 2339245, 3274943, 3742792, 4678490, 6549886, 7485584, 9356980, 13099772, 16374715, 18713960, 26199544, 32749430, 37427920, 52399088, 65498860, 130997720, 261995440]

約数ペア:

[(1, 261995440), (2, 130997720), (4, 65498860), (5, 52399088), (7, 37427920), (8, 32749430), (10, 26199544), (14, 18713960), (16, 16374715), (20, 13099772), (28, 9356980), (35, 7485584), (40, 6549886), (56, 4678490), (70, 3742792), (80, 3274943), (112, 2339245), (140, 1871396), (199, 1316560), (280, 935698), (398, 658280), (560, 467849), (796, 329140), (995, 263312), (1393, 188080), (1592, 164570), (1990, 131656), (2351, 111440), (2786, 94040), (3184, 82285), (3980, 65828), (4702, 55720), (5572, 47020), (6965, 37616), (7960, 32914), (9404, 27860), (11144, 23510), (11755, 22288), (13930, 18808), (15920, 16457)]