21105788

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{43607}}^1$

素因数の和:43633

約数の個数: 18

約数和(自身を含む): 40599048

約数和(自身を除く): 19493260

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 43607, 87214, 174428, 479677, 959354, 1918708, 5276447, 10552894, 21105788]

約数ペア:

[(1, 21105788), (2, 10552894), (4, 5276447), (11, 1918708), (22, 959354), (44, 479677), (121, 174428), (242, 87214), (484, 43607)]