21257847

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{5861}}^1$

素因数の和:5911

約数の個数: 24

約数和(自身を含む): 34140288

約数和(自身を除く): 12882441

約数列:

[1, 3, 9, 13, 31, 39, 93, 117, 279, 403, 1209, 3627, 5861, 17583, 52749, 76193, 181691, 228579, 545073, 685737, 1635219, 2361983, 7085949, 21257847]

約数ペア:

[(1, 21257847), (3, 7085949), (9, 2361983), (13, 1635219), (31, 685737), (39, 545073), (93, 228579), (117, 181691), (279, 76193), (403, 52749), (1209, 17583), (3627, 5861)]