21056720

素因数分解:

$2^4\times 5^1\times {\mathrm{263209}}^1$

素因数の和:263222

約数の個数: 20

約数和(自身を含む): 48957060

約数和(自身を除く): 27900340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263209, 526418, 1052836, 1316045, 2105672, 2632090, 4211344, 5264180, 10528360, 21056720]

約数ペア:

[(1, 21056720), (2, 10528360), (4, 5264180), (5, 4211344), (8, 2632090), (10, 2105672), (16, 1316045), (20, 1052836), (40, 526418), (80, 263209)]