20987523

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{1913}}^1$

素因数の和:1995

約数の個数: 24

約数和(自身を含む): 32247072

約数和(自身を除く): 11259549

約数列:

[1, 3, 9, 23, 53, 69, 159, 207, 477, 1219, 1913, 3657, 5739, 10971, 17217, 43999, 101389, 131997, 304167, 395991, 912501, 2331947, 6995841, 20987523]

約数ペア:

[(1, 20987523), (3, 6995841), (9, 2331947), (23, 912501), (53, 395991), (69, 304167), (159, 131997), (207, 101389), (477, 43999), (1219, 17217), (1913, 10971), (3657, 5739)]