21640976

素因数分解:

$2^4\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{271}}^1$

素因数の和:340

約数の個数: 80

約数和(自身を含む): 51806208

約数和(自身を除く): 30165232

約数列:

[1, 2, 4, 7, 8, 14, 16, 23, 28, 31, 46, 56, 62, 92, 112, 124, 161, 184, 217, 248, 271, 322, 368, 434, 496, 542, 644, 713, 868, 1084, 1288, 1426, 1736, 1897, 2168, 2576, 2852, 3472, 3794, 4336, 4991, 5704, 6233, 7588, 8401, 9982, 11408, 12466, 15176, 16802, 19964, 24932, 30352, 33604, 39928, 43631, 49864, 58807, 67208, 79856, 87262, 99728, 117614, 134416, 174524, 193223, 235228, 349048, 386446, 470456, 698096, 772892, 940912, 1352561, 1545784, 2705122, 3091568, 5410244, 10820488, 21640976]

約数ペア:

[(1, 21640976), (2, 10820488), (4, 5410244), (7, 3091568), (8, 2705122), (14, 1545784), (16, 1352561), (23, 940912), (28, 772892), (31, 698096), (46, 470456), (56, 386446), (62, 349048), (92, 235228), (112, 193223), (124, 174524), (161, 134416), (184, 117614), (217, 99728), (248, 87262), (271, 79856), (322, 67208), (368, 58807), (434, 49864), (496, 43631), (542, 39928), (644, 33604), (713, 30352), (868, 24932), (1084, 19964), (1288, 16802), (1426, 15176), (1736, 12466), (1897, 11408), (2168, 9982), (2576, 8401), (2852, 7588), (3472, 6233), (3794, 5704), (4336, 4991)]