257900258

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1\times {\mathrm{229}}^1$

素因数の和:423

約数の個数: 64

約数和(自身を含む): 496005120

約数和(自身を除く): 238104862

約数列:

[1, 2, 7, 11, 14, 22, 71, 77, 103, 142, 154, 206, 229, 458, 497, 721, 781, 994, 1133, 1442, 1562, 1603, 2266, 2519, 3206, 5038, 5467, 7313, 7931, 10934, 14626, 15862, 16259, 17633, 23587, 32518, 35266, 47174, 51191, 80443, 102382, 113813, 160886, 165109, 178849, 227626, 259457, 330218, 357698, 518914, 563101, 1126202, 1251943, 1674677, 1816199, 2503886, 3349354, 3632398, 11722739, 18421447, 23445478, 36842894, 128950129, 257900258]

約数ペア:

[(1, 257900258), (2, 128950129), (7, 36842894), (11, 23445478), (14, 18421447), (22, 11722739), (71, 3632398), (77, 3349354), (103, 2503886), (142, 1816199), (154, 1674677), (206, 1251943), (229, 1126202), (458, 563101), (497, 518914), (721, 357698), (781, 330218), (994, 259457), (1133, 227626), (1442, 178849), (1562, 165109), (1603, 160886), (2266, 113813), (2519, 102382), (3206, 80443), (5038, 51191), (5467, 47174), (7313, 35266), (7931, 32518), (10934, 23587), (14626, 17633), (15862, 16259)]