20717956

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{18047}}^1$

素因数の和:18099

約数の個数: 24

約数和(自身を含む): 42448896

約数和(自身を除く): 21730940

約数列:

[1, 2, 4, 7, 14, 28, 41, 82, 164, 287, 574, 1148, 18047, 36094, 72188, 126329, 252658, 505316, 739927, 1479854, 2959708, 5179489, 10358978, 20717956]

約数ペア:

[(1, 20717956), (2, 10358978), (4, 5179489), (7, 2959708), (14, 1479854), (28, 739927), (41, 505316), (82, 252658), (164, 126329), (287, 72188), (574, 36094), (1148, 18047)]