21208653

素因数分解:

$3^2\times {\mathrm{571}}^1\times {\mathrm{4127}}^1$

素因数の和:4704

約数の個数: 12

約数和(自身を含む): 30695808

約数和(自身を除く): 9487155

約数列:

[1, 3, 9, 571, 1713, 4127, 5139, 12381, 37143, 2356517, 7069551, 21208653]

約数ペア:

[(1, 21208653), (3, 7069551), (9, 2356517), (571, 37143), (1713, 12381), (4127, 5139)]