209911208

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{643}}^1$

素因数の和:778

約数の個数: 64

約数和(自身を含む): 440341440

約数和(自身を除く): 230430232

約数列:

[1, 2, 4, 8, 13, 26, 43, 52, 73, 86, 104, 146, 172, 292, 344, 559, 584, 643, 949, 1118, 1286, 1898, 2236, 2572, 3139, 3796, 4472, 5144, 6278, 7592, 8359, 12556, 16718, 25112, 27649, 33436, 40807, 46939, 55298, 66872, 81614, 93878, 110596, 163228, 187756, 221192, 326456, 359437, 375512, 610207, 718874, 1220414, 1437748, 2018377, 2440828, 2875496, 4036754, 4881656, 8073508, 16147016, 26238901, 52477802, 104955604, 209911208]

約数ペア:

[(1, 209911208), (2, 104955604), (4, 52477802), (8, 26238901), (13, 16147016), (26, 8073508), (43, 4881656), (52, 4036754), (73, 2875496), (86, 2440828), (104, 2018377), (146, 1437748), (172, 1220414), (292, 718874), (344, 610207), (559, 375512), (584, 359437), (643, 326456), (949, 221192), (1118, 187756), (1286, 163228), (1898, 110596), (2236, 93878), (2572, 81614), (3139, 66872), (3796, 55298), (4472, 46939), (5144, 40807), (6278, 33436), (7592, 27649), (8359, 25112), (12556, 16718)]