21355685

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{127}}^1\times {\mathrm{199}}^1$

素因数の和:357

約数の個数: 24

約数和(自身を含む): 28108800

約数和(自身を除く): 6753115

約数列:

[1, 5, 13, 65, 127, 169, 199, 635, 845, 995, 1651, 2587, 8255, 12935, 21463, 25273, 33631, 107315, 126365, 168155, 328549, 1642745, 4271137, 21355685]

約数ペア:

[(1, 21355685), (5, 4271137), (13, 1642745), (65, 328549), (127, 168155), (169, 126365), (199, 107315), (635, 33631), (845, 25273), (995, 21463), (1651, 12935), (2587, 8255)]