20257280

素因数分解:

$2^9\times 5^1\times {\mathrm{41}}^1\times {\mathrm{193}}^1$

素因数の和:257

約数の個数: 80

約数和(自身を含む): 50012424

約数和(自身を除く): 29755144

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 128, 160, 164, 193, 205, 256, 320, 328, 386, 410, 512, 640, 656, 772, 820, 965, 1280, 1312, 1544, 1640, 1930, 2560, 2624, 3088, 3280, 3860, 5248, 6176, 6560, 7720, 7913, 10496, 12352, 13120, 15440, 15826, 20992, 24704, 26240, 30880, 31652, 39565, 49408, 52480, 61760, 63304, 79130, 98816, 104960, 123520, 126608, 158260, 247040, 253216, 316520, 494080, 506432, 633040, 1012864, 1266080, 2025728, 2532160, 4051456, 5064320, 10128640, 20257280]

約数ペア:

[(1, 20257280), (2, 10128640), (4, 5064320), (5, 4051456), (8, 2532160), (10, 2025728), (16, 1266080), (20, 1012864), (32, 633040), (40, 506432), (41, 494080), (64, 316520), (80, 253216), (82, 247040), (128, 158260), (160, 126608), (164, 123520), (193, 104960), (205, 98816), (256, 79130), (320, 63304), (328, 61760), (386, 52480), (410, 49408), (512, 39565), (640, 31652), (656, 30880), (772, 26240), (820, 24704), (965, 20992), (1280, 15826), (1312, 15440), (1544, 13120), (1640, 12352), (1930, 10496), (2560, 7913), (2624, 7720), (3088, 6560), (3280, 6176), (3860, 5248)]