21533841

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{7949}}^1$

素因数の和:8005

約数の個数: 24

約数和(自身を含む): 36379200

約数和(自身を除く): 14845359

約数列:

[1, 3, 7, 9, 21, 43, 63, 129, 301, 387, 903, 2709, 7949, 23847, 55643, 71541, 166929, 341807, 500787, 1025421, 2392649, 3076263, 7177947, 21533841]

約数ペア:

[(1, 21533841), (3, 7177947), (7, 3076263), (9, 2392649), (21, 1025421), (43, 500787), (63, 341807), (129, 166929), (301, 71541), (387, 55643), (903, 23847), (2709, 7949)]