21388976

素因数分解:

$2^4\times 7^1\times {\mathrm{353}}^1\times {\mathrm{541}}^1$

素因数の和:909

約数の個数: 40

約数和(自身を含む): 47583264

約数和(自身を除く): 26194288

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 353, 541, 706, 1082, 1412, 2164, 2471, 2824, 3787, 4328, 4942, 5648, 7574, 8656, 9884, 15148, 19768, 30296, 39536, 60592, 190973, 381946, 763892, 1336811, 1527784, 2673622, 3055568, 5347244, 10694488, 21388976]

約数ペア:

[(1, 21388976), (2, 10694488), (4, 5347244), (7, 3055568), (8, 2673622), (14, 1527784), (16, 1336811), (28, 763892), (56, 381946), (112, 190973), (353, 60592), (541, 39536), (706, 30296), (1082, 19768), (1412, 15148), (2164, 9884), (2471, 8656), (2824, 7574), (3787, 5648), (4328, 4942)]