20215805

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{5531}}^1$

素因数の和:5596

約数の個数: 16

約数和(自身を含む): 26288064

約数和(自身を除く): 6072259

約数列:

[1, 5, 17, 43, 85, 215, 731, 3655, 5531, 27655, 94027, 237833, 470135, 1189165, 4043161, 20215805]

約数ペア:

[(1, 20215805), (5, 4043161), (17, 1189165), (43, 470135), (85, 237833), (215, 94027), (731, 27655), (3655, 5531)]