21397136

素因数分解:

$2^4\times {\mathrm{109}}^1\times {\mathrm{12269}}^1$

素因数の和:12386

約数の個数: 20

約数和(自身を含む): 41840700

約数和(自身を除く): 20443564

約数列:

[1, 2, 4, 8, 16, 109, 218, 436, 872, 1744, 12269, 24538, 49076, 98152, 196304, 1337321, 2674642, 5349284, 10698568, 21397136]

約数ペア:

[(1, 21397136), (2, 10698568), (4, 5349284), (8, 2674642), (16, 1337321), (109, 196304), (218, 98152), (436, 49076), (872, 24538), (1744, 12269)]