205870225

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^2\times {\mathrm{41}}^1$

素因数の和:143

約数の個数: 72

約数和(自身を含む): 310292640

約数和(自身を除く): 104422415

約数列:

[1, 5, 11, 19, 25, 31, 41, 55, 95, 155, 205, 209, 275, 341, 451, 475, 589, 775, 779, 961, 1025, 1045, 1271, 1705, 2255, 2945, 3895, 4805, 5225, 6355, 6479, 8525, 8569, 10571, 11275, 13981, 14725, 18259, 19475, 24025, 24149, 31775, 32395, 39401, 42845, 52855, 69905, 91295, 120745, 161975, 197005, 200849, 214225, 264275, 265639, 349525, 433411, 456475, 603725, 748619, 985025, 1004245, 1328195, 2167055, 3743095, 5021225, 6640975, 8234809, 10835275, 18715475, 41174045, 205870225]

約数ペア:

[(1, 205870225), (5, 41174045), (11, 18715475), (19, 10835275), (25, 8234809), (31, 6640975), (41, 5021225), (55, 3743095), (95, 2167055), (155, 1328195), (205, 1004245), (209, 985025), (275, 748619), (341, 603725), (451, 456475), (475, 433411), (589, 349525), (775, 265639), (779, 264275), (961, 214225), (1025, 200849), (1045, 197005), (1271, 161975), (1705, 120745), (2255, 91295), (2945, 69905), (3895, 52855), (4805, 42845), (5225, 39401), (6355, 32395), (6479, 31775), (8525, 24149), (8569, 24025), (10571, 19475), (11275, 18259), (13981, 14725)]