21005312

素因数分解:

$2^{10}\times {\mathrm{73}}^1\times {\mathrm{281}}^1$

素因数の和:374

約数の個数: 44

約数和(自身を含む): 42716796

約数和(自身を除く): 21711484

約数列:

[1, 2, 4, 8, 16, 32, 64, 73, 128, 146, 256, 281, 292, 512, 562, 584, 1024, 1124, 1168, 2248, 2336, 4496, 4672, 8992, 9344, 17984, 18688, 20513, 35968, 37376, 41026, 71936, 74752, 82052, 143872, 164104, 287744, 328208, 656416, 1312832, 2625664, 5251328, 10502656, 21005312]

約数ペア:

[(1, 21005312), (2, 10502656), (4, 5251328), (8, 2625664), (16, 1312832), (32, 656416), (64, 328208), (73, 287744), (128, 164104), (146, 143872), (256, 82052), (281, 74752), (292, 71936), (512, 41026), (562, 37376), (584, 35968), (1024, 20513), (1124, 18688), (1168, 17984), (2248, 9344), (2336, 8992), (4496, 4672)]