21581444

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{75991}}^1$

素因数の和:76066

約数の個数: 12

約数和(自身を含む): 38299968

約数和(自身を除く): 16718524

約数列:

[1, 2, 4, 71, 142, 284, 75991, 151982, 303964, 5395361, 10790722, 21581444]

約数ペア:

[(1, 21581444), (2, 10790722), (4, 5395361), (71, 303964), (142, 151982), (284, 75991)]