21908480

素因数分解:

$2^{10}\times 5^1\times {\mathrm{11}}^1\times {\mathrm{389}}^1$

素因数の和:425

約数の個数: 88

約数和(自身を含む): 57479760

約数和(自身を除く): 35571280

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 128, 160, 176, 220, 256, 320, 352, 389, 440, 512, 640, 704, 778, 880, 1024, 1280, 1408, 1556, 1760, 1945, 2560, 2816, 3112, 3520, 3890, 4279, 5120, 5632, 6224, 7040, 7780, 8558, 11264, 12448, 14080, 15560, 17116, 21395, 24896, 28160, 31120, 34232, 42790, 49792, 56320, 62240, 68464, 85580, 99584, 124480, 136928, 171160, 199168, 248960, 273856, 342320, 398336, 497920, 547712, 684640, 995840, 1095424, 1369280, 1991680, 2190848, 2738560, 4381696, 5477120, 10954240, 21908480]

約数ペア:

[(1, 21908480), (2, 10954240), (4, 5477120), (5, 4381696), (8, 2738560), (10, 2190848), (11, 1991680), (16, 1369280), (20, 1095424), (22, 995840), (32, 684640), (40, 547712), (44, 497920), (55, 398336), (64, 342320), (80, 273856), (88, 248960), (110, 199168), (128, 171160), (160, 136928), (176, 124480), (220, 99584), (256, 85580), (320, 68464), (352, 62240), (389, 56320), (440, 49792), (512, 42790), (640, 34232), (704, 31120), (778, 28160), (880, 24896), (1024, 21395), (1280, 17116), (1408, 15560), (1556, 14080), (1760, 12448), (1945, 11264), (2560, 8558), (2816, 7780), (3112, 7040), (3520, 6224), (3890, 5632), (4279, 5120)]