20687290

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{12241}}^1$

素因数の和:12274

約数の個数: 24

約数和(自身を含む): 40325148

約数和(自身を除く): 19637858

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 12241, 24482, 61205, 122410, 159133, 318266, 795665, 1591330, 2068729, 4137458, 10343645, 20687290]

約数ペア:

[(1, 20687290), (2, 10343645), (5, 4137458), (10, 2068729), (13, 1591330), (26, 795665), (65, 318266), (130, 159133), (169, 122410), (338, 61205), (845, 24482), (1690, 12241)]