18172420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{129803}}^1$

素因数の和:129819

約数の個数: 24

約数和(自身を含む): 43614144

約数和(自身を除く): 25441724

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 129803, 259606, 519212, 649015, 908621, 1298030, 1817242, 2596060, 3634484, 4543105, 9086210, 18172420]

約数ペア:

[(1, 18172420), (2, 9086210), (4, 4543105), (5, 3634484), (7, 2596060), (10, 1817242), (14, 1298030), (20, 908621), (28, 649015), (35, 519212), (70, 259606), (140, 129803)]