21378224

素因数分解:

$2^4\times 7^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{193}}^1$

素因数の和:274

約数の個数: 80

約数和(自身を含む): 50806272

約数和(自身を除く): 29428048

約数列:

[1, 2, 4, 7, 8, 14, 16, 23, 28, 43, 46, 56, 86, 92, 112, 161, 172, 184, 193, 301, 322, 344, 368, 386, 602, 644, 688, 772, 989, 1204, 1288, 1351, 1544, 1978, 2408, 2576, 2702, 3088, 3956, 4439, 4816, 5404, 6923, 7912, 8299, 8878, 10808, 13846, 15824, 16598, 17756, 21616, 27692, 31073, 33196, 35512, 55384, 58093, 62146, 66392, 71024, 110768, 116186, 124292, 132784, 190877, 232372, 248584, 381754, 464744, 497168, 763508, 929488, 1336139, 1527016, 2672278, 3054032, 5344556, 10689112, 21378224]

約数ペア:

[(1, 21378224), (2, 10689112), (4, 5344556), (7, 3054032), (8, 2672278), (14, 1527016), (16, 1336139), (23, 929488), (28, 763508), (43, 497168), (46, 464744), (56, 381754), (86, 248584), (92, 232372), (112, 190877), (161, 132784), (172, 124292), (184, 116186), (193, 110768), (301, 71024), (322, 66392), (344, 62146), (368, 58093), (386, 55384), (602, 35512), (644, 33196), (688, 31073), (772, 27692), (989, 21616), (1204, 17756), (1288, 16598), (1351, 15824), (1544, 13846), (1978, 10808), (2408, 8878), (2576, 8299), (2702, 7912), (3088, 6923), (3956, 5404), (4439, 4816)]