640906128

素因数分解:

$2^4\times 3^3\times {\mathrm{73}}^1\times {\mathrm{20323}}^1$

素因数の和:20413

約数の個数: 80

約数和(自身を含む): 1864930240

約数和(自身を除く): 1224024112

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, 36, 48, 54, 72, 73, 108, 144, 146, 216, 219, 292, 432, 438, 584, 657, 876, 1168, 1314, 1752, 1971, 2628, 3504, 3942, 5256, 7884, 10512, 15768, 20323, 31536, 40646, 60969, 81292, 121938, 162584, 182907, 243876, 325168, 365814, 487752, 548721, 731628, 975504, 1097442, 1463256, 1483579, 2194884, 2926512, 2967158, 4389768, 4450737, 5934316, 8779536, 8901474, 11868632, 13352211, 17802948, 23737264, 26704422, 35605896, 40056633, 53408844, 71211792, 80113266, 106817688, 160226532, 213635376, 320453064, 640906128]

約数ペア:

[(1, 640906128), (2, 320453064), (3, 213635376), (4, 160226532), (6, 106817688), (8, 80113266), (9, 71211792), (12, 53408844), (16, 40056633), (18, 35605896), (24, 26704422), (27, 23737264), (36, 17802948), (48, 13352211), (54, 11868632), (72, 8901474), (73, 8779536), (108, 5934316), (144, 4450737), (146, 4389768), (216, 2967158), (219, 2926512), (292, 2194884), (432, 1483579), (438, 1463256), (584, 1097442), (657, 975504), (876, 731628), (1168, 548721), (1314, 487752), (1752, 365814), (1971, 325168), (2628, 243876), (3504, 182907), (3942, 162584), (5256, 121938), (7884, 81292), (10512, 60969), (15768, 40646), (20323, 31536)]