20890790

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{122887}}^1$

素因数の和:122911

約数の個数: 16

約数和(自身を含む): 39815712

約数和(自身を除く): 18924922

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 122887, 245774, 614435, 1228870, 2089079, 4178158, 10445395, 20890790]

約数ペア:

[(1, 20890790), (2, 10445395), (5, 4178158), (10, 2089079), (17, 1228870), (34, 614435), (85, 245774), (170, 122887)]