21284656

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{30937}}^1$

素因数の和:30988

約数の個数: 20

約数和(自身を含む): 42199432

約数和(自身を除く): 20914776

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 30937, 61874, 123748, 247496, 494992, 1330291, 2660582, 5321164, 10642328, 21284656]

約数ペア:

[(1, 21284656), (2, 10642328), (4, 5321164), (8, 2660582), (16, 1330291), (43, 494992), (86, 247496), (172, 123748), (344, 61874), (688, 30937)]