21256976

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{102197}}^1$

素因数の和:102218

約数の個数: 20

約数和(自身を含む): 44353932

約数和(自身を除く): 23096956

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 102197, 204394, 408788, 817576, 1328561, 1635152, 2657122, 5314244, 10628488, 21256976]

約数ペア:

[(1, 21256976), (2, 10628488), (4, 5314244), (8, 2657122), (13, 1635152), (16, 1328561), (26, 817576), (52, 408788), (104, 204394), (208, 102197)]