20561139

素因数分解:

$3^2\times {\mathrm{571}}^1\times {\mathrm{4001}}^1$

素因数の和:4578

約数の個数: 12

約数和(自身を含む): 29758872

約数和(自身を除く): 9197733

約数列:

[1, 3, 9, 571, 1713, 4001, 5139, 12003, 36009, 2284571, 6853713, 20561139]

約数ペア:

[(1, 20561139), (3, 6853713), (9, 2284571), (571, 36009), (1713, 12003), (4001, 5139)]