21018291

素因数分解:

$3^1\times 7^1\times {\mathrm{569}}^1\times {\mathrm{1759}}^1$

素因数の和:2338

約数の個数: 16

約数和(自身を含む): 32102400

約数和(自身を除く): 11084109

約数列:

[1, 3, 7, 21, 569, 1707, 1759, 3983, 5277, 11949, 12313, 36939, 1000871, 3002613, 7006097, 21018291]

約数ペア:

[(1, 21018291), (3, 7006097), (7, 3002613), (21, 1000871), (569, 36939), (1707, 12313), (1759, 11949), (3983, 5277)]