1991585920

素因数分解:

$2^7\times 5^1\times {\mathrm{3111853}}^1$

素因数の和:3111872

約数の個数: 32

約数和(自身を含む): 4761136620

約数和(自身を除く): 2769550700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 3111853, 6223706, 12447412, 15559265, 24894824, 31118530, 49789648, 62237060, 99579296, 124474120, 199158592, 248948240, 398317184, 497896480, 995792960, 1991585920]

約数ペア:

[(1, 1991585920), (2, 995792960), (4, 497896480), (5, 398317184), (8, 248948240), (10, 199158592), (16, 124474120), (20, 99579296), (32, 62237060), (40, 49789648), (64, 31118530), (80, 24894824), (128, 15559265), (160, 12447412), (320, 6223706), (640, 3111853)]