21249740

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{24709}}^1$

素因数の和:24761

約数の個数: 24

約数和(自身を含む): 45664080

約数和(自身を除く): 24414340

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 24709, 49418, 98836, 123545, 247090, 494180, 1062487, 2124974, 4249948, 5312435, 10624870, 21249740]

約数ペア:

[(1, 21249740), (2, 10624870), (4, 5312435), (5, 4249948), (10, 2124974), (20, 1062487), (43, 494180), (86, 247090), (172, 123545), (215, 98836), (430, 49418), (860, 24709)]