20821204

素因数分解:

$2^2\times {\mathrm{1301}}^1\times {\mathrm{4001}}^1$

素因数の和:5306

約数の個数: 12

約数和(自身を含む): 36474228

約数和(自身を除く): 15653024

約数列:

[1, 2, 4, 1301, 2602, 4001, 5204, 8002, 16004, 5205301, 10410602, 20821204]

約数ペア:

[(1, 20821204), (2, 10410602), (4, 5205301), (1301, 16004), (2602, 8002), (4001, 5204)]