21009256

素因数分解:

$2^3\times {\mathrm{131}}^1\times {\mathrm{20047}}^1$

素因数の和:20184

約数の個数: 16

約数和(自身を含む): 39695040

約数和(自身を除く): 18685784

約数列:

[1, 2, 4, 8, 131, 262, 524, 1048, 20047, 40094, 80188, 160376, 2626157, 5252314, 10504628, 21009256]

約数ペア:

[(1, 21009256), (2, 10504628), (4, 5252314), (8, 2626157), (131, 160376), (262, 80188), (524, 40094), (1048, 20047)]