21656313

素因数分解:

$3^2\times 7^1\times {\mathrm{173}}^1\times {\mathrm{1987}}^1$

素因数の和:2173

約数の個数: 24

約数和(自身を含む): 35974848

約数和(自身を除く): 14318535

約数列:

[1, 3, 7, 9, 21, 63, 173, 519, 1211, 1557, 1987, 3633, 5961, 10899, 13909, 17883, 41727, 125181, 343751, 1031253, 2406257, 3093759, 7218771, 21656313]

約数ペア:

[(1, 21656313), (3, 7218771), (7, 3093759), (9, 2406257), (21, 1031253), (63, 343751), (173, 125181), (519, 41727), (1211, 17883), (1557, 13909), (1987, 10899), (3633, 5961)]