20972204

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{43331}}^1$

素因数の和:43357

約数の個数: 18

約数和(自身を含む): 40342092

約数和(自身を除く): 19369888

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 43331, 86662, 173324, 476641, 953282, 1906564, 5243051, 10486102, 20972204]

約数ペア:

[(1, 20972204), (2, 10486102), (4, 5243051), (11, 1906564), (22, 953282), (44, 476641), (121, 173324), (242, 86662), (484, 43331)]