21154660

素因数分解:

$2^2\times 5^1\times {\mathrm{827}}^1\times {\mathrm{1279}}^1$

素因数の和:2115

約数の個数: 24

約数和(自身を含む): 44513280

約数和(自身を除く): 23358620

約数列:

[1, 2, 4, 5, 10, 20, 827, 1279, 1654, 2558, 3308, 4135, 5116, 6395, 8270, 12790, 16540, 25580, 1057733, 2115466, 4230932, 5288665, 10577330, 21154660]

約数ペア:

[(1, 21154660), (2, 10577330), (4, 5288665), (5, 4230932), (10, 2115466), (20, 1057733), (827, 25580), (1279, 16540), (1654, 12790), (2558, 8270), (3308, 6395), (4135, 5116)]