21295204

素因数分解:

$2^2\times 7^2\times {\mathrm{108649}}^1$

素因数の和:108667

約数の個数: 18

約数和(自身を含む): 43351350

約数和(自身を除く): 22056146

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 108649, 217298, 434596, 760543, 1521086, 3042172, 5323801, 10647602, 21295204]

約数ペア:

[(1, 21295204), (2, 10647602), (4, 5323801), (7, 3042172), (14, 1521086), (28, 760543), (49, 434596), (98, 217298), (196, 108649)]