21735640

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{12637}}^1$

素因数の和:12691

約数の個数: 32

約数和(自身を含む): 50046480

約数和(自身を除く): 28310840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 12637, 25274, 50548, 63185, 101096, 126370, 252740, 505480, 543391, 1086782, 2173564, 2716955, 4347128, 5433910, 10867820, 21735640]

約数ペア:

[(1, 21735640), (2, 10867820), (4, 5433910), (5, 4347128), (8, 2716955), (10, 2173564), (20, 1086782), (40, 543391), (43, 505480), (86, 252740), (172, 126370), (215, 101096), (344, 63185), (430, 50548), (860, 25274), (1720, 12637)]