20561387

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{3761}}^1$

素因数の和:3850

約数の個数: 16

約数和(自身を含む): 26002944

約数和(自身を除く): 5441557

約数列:

[1, 7, 11, 71, 77, 497, 781, 3761, 5467, 26327, 41371, 267031, 289597, 1869217, 2937341, 20561387]

約数ペア:

[(1, 20561387), (7, 2937341), (11, 1869217), (71, 289597), (77, 267031), (497, 41371), (781, 26327), (3761, 5467)]