209532980

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{243643}}^1$

素因数の和:243695

約数の個数: 24

約数和(自身を含む): 450254112

約数和(自身を除く): 240721132

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 243643, 487286, 974572, 1218215, 2436430, 4872860, 10476649, 20953298, 41906596, 52383245, 104766490, 209532980]

約数ペア:

[(1, 209532980), (2, 104766490), (4, 52383245), (5, 41906596), (10, 20953298), (20, 10476649), (43, 4872860), (86, 2436430), (172, 1218215), (215, 974572), (430, 487286), (860, 243643)]