21039568

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{173}}^1\times {\mathrm{691}}^1$

素因数の和:883

約数の個数: 40

約数和(自身を含む): 44791776

約数和(自身を除く): 23752208

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 173, 176, 346, 691, 692, 1382, 1384, 1903, 2764, 2768, 3806, 5528, 7601, 7612, 11056, 15202, 15224, 30404, 30448, 60808, 119543, 121616, 239086, 478172, 956344, 1314973, 1912688, 2629946, 5259892, 10519784, 21039568]

約数ペア:

[(1, 21039568), (2, 10519784), (4, 5259892), (8, 2629946), (11, 1912688), (16, 1314973), (22, 956344), (44, 478172), (88, 239086), (173, 121616), (176, 119543), (346, 60808), (691, 30448), (692, 30404), (1382, 15224), (1384, 15202), (1903, 11056), (2764, 7612), (2768, 7601), (3806, 5528)]