21140889

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{1289}}^1$

素因数の和:1381

約数の個数: 32

約数和(自身を含む): 35665920

約数和(自身を除く): 14525031

約数列:

[1, 3, 7, 11, 21, 33, 71, 77, 213, 231, 497, 781, 1289, 1491, 2343, 3867, 5467, 9023, 14179, 16401, 27069, 42537, 91519, 99253, 274557, 297759, 640633, 1006709, 1921899, 3020127, 7046963, 21140889]

約数ペア:

[(1, 21140889), (3, 7046963), (7, 3020127), (11, 1921899), (21, 1006709), (33, 640633), (71, 297759), (77, 274557), (213, 99253), (231, 91519), (497, 42537), (781, 27069), (1289, 16401), (1491, 14179), (2343, 9023), (3867, 5467)]