18721168

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{27211}}^1$

素因数の和:27262

約数の個数: 20

約数和(自身を含む): 37117168

約数和(自身を除く): 18396000

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 27211, 54422, 108844, 217688, 435376, 1170073, 2340146, 4680292, 9360584, 18721168]

約数ペア:

[(1, 18721168), (2, 9360584), (4, 4680292), (8, 2340146), (16, 1170073), (43, 435376), (86, 217688), (172, 108844), (344, 54422), (688, 27211)]