64697680

素因数分解:

$2^4\times 5^1\times {\mathrm{808721}}^1$

素因数の和:808734

約数の個数: 20

約数和(自身を含む): 150422292

約数和(自身を除く): 85724612

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 808721, 1617442, 3234884, 4043605, 6469768, 8087210, 12939536, 16174420, 32348840, 64697680]

約数ペア:

[(1, 64697680), (2, 32348840), (4, 16174420), (5, 12939536), (8, 8087210), (10, 6469768), (16, 4043605), (20, 3234884), (40, 1617442), (80, 808721)]