20909290

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{72101}}^1$

素因数の和:72137

約数の個数: 16

約数和(自身を含む): 38935080

約数和(自身を除く): 18025790

約数列:

[1, 2, 5, 10, 29, 58, 145, 290, 72101, 144202, 360505, 721010, 2090929, 4181858, 10454645, 20909290]

約数ペア:

[(1, 20909290), (2, 10454645), (5, 4181858), (10, 2090929), (29, 721010), (58, 360505), (145, 144202), (290, 72101)]