21038578

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{13469}}^1$

素因数の和:13553

約数の個数: 16

約数和(自身を含む): 34914240

約数和(自身を除く): 13875662

約数列:

[1, 2, 11, 22, 71, 142, 781, 1562, 13469, 26938, 148159, 296318, 956299, 1912598, 10519289, 21038578]

約数ペア:

[(1, 21038578), (2, 10519289), (11, 1912598), (22, 956299), (71, 296318), (142, 148159), (781, 26938), (1562, 13469)]