66721280

素因数分解:

$2^9\times 5^1\times {\mathrm{67}}^1\times {\mathrm{389}}^1$

素因数の和:479

約数の個数: 80

約数和(自身を含む): 162779760

約数和(自身を除く): 96058480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 67, 80, 128, 134, 160, 256, 268, 320, 335, 389, 512, 536, 640, 670, 778, 1072, 1280, 1340, 1556, 1945, 2144, 2560, 2680, 3112, 3890, 4288, 5360, 6224, 7780, 8576, 10720, 12448, 15560, 17152, 21440, 24896, 26063, 31120, 34304, 42880, 49792, 52126, 62240, 85760, 99584, 104252, 124480, 130315, 171520, 199168, 208504, 248960, 260630, 417008, 497920, 521260, 834016, 995840, 1042520, 1668032, 2085040, 3336064, 4170080, 6672128, 8340160, 13344256, 16680320, 33360640, 66721280]

約数ペア:

[(1, 66721280), (2, 33360640), (4, 16680320), (5, 13344256), (8, 8340160), (10, 6672128), (16, 4170080), (20, 3336064), (32, 2085040), (40, 1668032), (64, 1042520), (67, 995840), (80, 834016), (128, 521260), (134, 497920), (160, 417008), (256, 260630), (268, 248960), (320, 208504), (335, 199168), (389, 171520), (512, 130315), (536, 124480), (640, 104252), (670, 99584), (778, 85760), (1072, 62240), (1280, 52126), (1340, 49792), (1556, 42880), (1945, 34304), (2144, 31120), (2560, 26063), (2680, 24896), (3112, 21440), (3890, 17152), (4288, 15560), (5360, 12448), (6224, 10720), (7780, 8576)]