21720083

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{683}}^1$

素因数の和:767

約数の個数: 24

約数和(自身を含む): 28071360

約数和(自身を除く): 6351277

約数列:

[1, 7, 11, 49, 59, 77, 413, 539, 649, 683, 2891, 4543, 4781, 7513, 31801, 33467, 40297, 52591, 282079, 368137, 443267, 1974553, 3102869, 21720083]

約数ペア:

[(1, 21720083), (7, 3102869), (11, 1974553), (49, 443267), (59, 368137), (77, 282079), (413, 52591), (539, 40297), (649, 33467), (683, 31801), (2891, 7513), (4543, 4781)]