21270380

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{24733}}^1$

素因数の和:24785

約数の個数: 24

約数和(自身を含む): 45708432

約数和(自身を除く): 24438052

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 24733, 49466, 98932, 123665, 247330, 494660, 1063519, 2127038, 4254076, 5317595, 10635190, 21270380]

約数ペア:

[(1, 21270380), (2, 10635190), (4, 5317595), (5, 4254076), (10, 2127038), (20, 1063519), (43, 494660), (86, 247330), (172, 123665), (215, 98932), (430, 49466), (860, 24733)]