20905810

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{72089}}^1$

素因数の和:72125

約数の個数: 16

約数和(自身を含む): 38928600

約数和(自身を除く): 18022790

約数列:

[1, 2, 5, 10, 29, 58, 145, 290, 72089, 144178, 360445, 720890, 2090581, 4181162, 10452905, 20905810]

約数ペア:

[(1, 20905810), (2, 10452905), (5, 4181162), (10, 2090581), (29, 720890), (58, 360445), (145, 144178), (290, 72089)]