21319701

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{12713}}^1$

素因数の和:12772

約数の個数: 16

約数和(自身を含む): 31327296

約数和(自身を除く): 10007595

約数列:

[1, 3, 13, 39, 43, 129, 559, 1677, 12713, 38139, 165269, 495807, 546659, 1639977, 7106567, 21319701]

約数ペア:

[(1, 21319701), (3, 7106567), (13, 1639977), (39, 546659), (43, 495807), (129, 165269), (559, 38139), (1677, 12713)]