21000447

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{13807}}^1$

素因数の和:13839

約数の個数: 18

約数和(自身を含む): 32849232

約数和(自身を除く): 11848785

約数列:

[1, 3, 9, 13, 39, 117, 169, 507, 1521, 13807, 41421, 124263, 179491, 538473, 1615419, 2333383, 7000149, 21000447]

約数ペア:

[(1, 21000447), (3, 7000149), (9, 2333383), (13, 1615419), (39, 538473), (117, 179491), (169, 124263), (507, 41421), (1521, 13807)]