20403328

素因数分解:

$2^7\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{337}}^1$

素因数の和:405

約数の個数: 64

約数和(自身を含む): 45508320

約数和(自身を除く): 25104992

約数列:

[1, 2, 4, 8, 11, 16, 22, 32, 43, 44, 64, 86, 88, 128, 172, 176, 337, 344, 352, 473, 674, 688, 704, 946, 1348, 1376, 1408, 1892, 2696, 2752, 3707, 3784, 5392, 5504, 7414, 7568, 10784, 14491, 14828, 15136, 21568, 28982, 29656, 30272, 43136, 57964, 59312, 60544, 115928, 118624, 159401, 231856, 237248, 318802, 463712, 474496, 637604, 927424, 1275208, 1854848, 2550416, 5100832, 10201664, 20403328]

約数ペア:

[(1, 20403328), (2, 10201664), (4, 5100832), (8, 2550416), (11, 1854848), (16, 1275208), (22, 927424), (32, 637604), (43, 474496), (44, 463712), (64, 318802), (86, 237248), (88, 231856), (128, 159401), (172, 118624), (176, 115928), (337, 60544), (344, 59312), (352, 57964), (473, 43136), (674, 30272), (688, 29656), (704, 28982), (946, 21568), (1348, 15136), (1376, 14828), (1408, 14491), (1892, 10784), (2696, 7568), (2752, 7414), (3707, 5504), (3784, 5392)]