18819280

素因数分解:

$2^4\times 5^1\times {\mathrm{235241}}^1$

素因数の和:235254

約数の個数: 20

約数和(自身を含む): 43755012

約数和(自身を除く): 24935732

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 235241, 470482, 940964, 1176205, 1881928, 2352410, 3763856, 4704820, 9409640, 18819280]

約数ペア:

[(1, 18819280), (2, 9409640), (4, 4704820), (5, 3763856), (8, 2352410), (10, 1881928), (16, 1176205), (20, 940964), (40, 470482), (80, 235241)]