21909087

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{1997}}^1$

素因数の和:2079

約数の個数: 24

約数和(自身を含む): 33662304

約数和(自身を除く): 11753217

約数列:

[1, 3, 9, 23, 53, 69, 159, 207, 477, 1219, 1997, 3657, 5991, 10971, 17973, 45931, 105841, 137793, 317523, 413379, 952569, 2434343, 7303029, 21909087]

約数ペア:

[(1, 21909087), (3, 7303029), (9, 2434343), (23, 952569), (53, 413379), (69, 317523), (159, 137793), (207, 105841), (477, 45931), (1219, 17973), (1997, 10971), (3657, 5991)]