21087129

素因数分解:

$3^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{4759}}^1$

素因数の和:4980

約数の個数: 16

約数和(自身を含む): 32291840

約数和(自身を除く): 11204711

約数列:

[1, 3, 7, 21, 211, 633, 1477, 4431, 4759, 14277, 33313, 99939, 1004149, 3012447, 7029043, 21087129]

約数ペア:

[(1, 21087129), (3, 7029043), (7, 3012447), (21, 1004149), (211, 99939), (633, 33313), (1477, 14277), (4431, 4759)]