20811538

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{37}}^2\times {\mathrm{691}}^1$

素因数の和:778

約数の個数: 24

約数和(自身を含む): 35051184

約数和(自身を除く): 14239646

約数列:

[1, 2, 11, 22, 37, 74, 407, 691, 814, 1369, 1382, 2738, 7601, 15059, 15202, 25567, 30118, 51134, 281237, 562474, 945979, 1891958, 10405769, 20811538]

約数ペア:

[(1, 20811538), (2, 10405769), (11, 1891958), (22, 945979), (37, 562474), (74, 281237), (407, 51134), (691, 30118), (814, 25567), (1369, 15202), (1382, 15059), (2738, 7601)]