21641589

素因数分解:

$3^2\times {\mathrm{19}}^2\times {\mathrm{6661}}^1$

素因数の和:6705

約数の個数: 18

約数和(自身を含む): 32996886

約数和(自身を除く): 11355297

約数列:

[1, 3, 9, 19, 57, 171, 361, 1083, 3249, 6661, 19983, 59949, 126559, 379677, 1139031, 2404621, 7213863, 21641589]

約数ペア:

[(1, 21641589), (3, 7213863), (9, 2404621), (19, 1139031), (57, 379677), (171, 126559), (361, 59949), (1083, 19983), (3249, 6661)]