19702991

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{4337}}^1$

素因数の和:4414

約数の個数: 16

約数和(自身を含む): 24986880

約数和(自身を除く): 5283889

約数列:

[1, 7, 11, 59, 77, 413, 649, 4337, 4543, 30359, 47707, 255883, 333949, 1791181, 2814713, 19702991]

約数ペア:

[(1, 19702991), (7, 2814713), (11, 1791181), (59, 333949), (77, 255883), (413, 47707), (649, 30359), (4337, 4543)]