20512395925

素因数分解:

$5^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{103}}^1\times {\mathrm{131}}^1$

素因数の和:348

約数の個数: 144

約数和(自身を含む): 32310824832

約数和(自身を除く): 11798428907

約数列:

[1, 5, 7, 17, 25, 35, 49, 73, 85, 103, 119, 131, 175, 245, 365, 425, 511, 515, 595, 655, 721, 833, 917, 1225, 1241, 1751, 1825, 2227, 2555, 2575, 2975, 3275, 3577, 3605, 4165, 4585, 5047, 6205, 6419, 7519, 8687, 8755, 9563, 11135, 12257, 12775, 13493, 15589, 17885, 18025, 20825, 22925, 25235, 31025, 32095, 37595, 43435, 43775, 47815, 52633, 55675, 60809, 61285, 66941, 67465, 77945, 85799, 89425, 94451, 109123, 126175, 127823, 160475, 162571, 187975, 217175, 229381, 239075, 263165, 304045, 306425, 334705, 337325, 368431, 389725, 428995, 468587, 472255, 545615, 639115, 661157, 812855, 894761, 984989, 1137997, 1146905, 1315825, 1520225, 1605667, 1673525, 1842155, 2144975, 2342935, 2361275, 2728075, 3195575, 3305785, 4064275, 4473805, 4924945, 5689985, 5734525, 6263327, 6894923, 7965979, 8028335, 9210775, 11239669, 11714675, 16528925, 16744813, 22369025, 24624725, 28449925, 31316635, 34474615, 39829895, 40141675, 48264461, 56198345, 83724065, 117213691, 156583175, 172373075, 199149475, 241322305, 280991725, 418620325, 586068455, 820495837, 1206611525, 2930342275, 4102479185, 20512395925]

約数ペア:

[(1, 20512395925), (5, 4102479185), (7, 2930342275), (17, 1206611525), (25, 820495837), (35, 586068455), (49, 418620325), (73, 280991725), (85, 241322305), (103, 199149475), (119, 172373075), (131, 156583175), (175, 117213691), (245, 83724065), (365, 56198345), (425, 48264461), (511, 40141675), (515, 39829895), (595, 34474615), (655, 31316635), (721, 28449925), (833, 24624725), (917, 22369025), (1225, 16744813), (1241, 16528925), (1751, 11714675), (1825, 11239669), (2227, 9210775), (2555, 8028335), (2575, 7965979), (2975, 6894923), (3275, 6263327), (3577, 5734525), (3605, 5689985), (4165, 4924945), (4585, 4473805), (5047, 4064275), (6205, 3305785), (6419, 3195575), (7519, 2728075), (8687, 2361275), (8755, 2342935), (9563, 2144975), (11135, 1842155), (12257, 1673525), (12775, 1605667), (13493, 1520225), (15589, 1315825), (17885, 1146905), (18025, 1137997), (20825, 984989), (22925, 894761), (25235, 812855), (31025, 661157), (32095, 639115), (37595, 545615), (43435, 472255), (43775, 468587), (47815, 428995), (52633, 389725), (55675, 368431), (60809, 337325), (61285, 334705), (66941, 306425), (67465, 304045), (77945, 263165), (85799, 239075), (89425, 229381), (94451, 217175), (109123, 187975), (126175, 162571), (127823, 160475)]