21203791

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{1217}}^1$

素因数の和:1374

約数の個数: 16

約数和(自身を含む): 25724160

約数和(自身を除く): 4520369

約数列:

[1, 7, 19, 131, 133, 917, 1217, 2489, 8519, 17423, 23123, 159427, 161861, 1115989, 3029113, 21203791]

約数ペア:

[(1, 21203791), (7, 3029113), (19, 1115989), (131, 161861), (133, 159427), (917, 23123), (1217, 17423), (2489, 8519)]