20421872

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{17977}}^1$

素因数の和:18056

約数の個数: 20

約数和(自身を含む): 40126896

約数和(自身を除く): 19705024

約数列:

[1, 2, 4, 8, 16, 71, 142, 284, 568, 1136, 17977, 35954, 71908, 143816, 287632, 1276367, 2552734, 5105468, 10210936, 20421872]

約数ペア:

[(1, 20421872), (2, 10210936), (4, 5105468), (8, 2552734), (16, 1276367), (71, 287632), (142, 143816), (284, 71908), (568, 35954), (1136, 17977)]