19729904

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{64901}}^1$

素因数の和:64928

約数の個数: 20

約数和(自身を含む): 40239240

約数和(自身を除く): 20509336

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 64901, 129802, 259604, 519208, 1038416, 1233119, 2466238, 4932476, 9864952, 19729904]

約数ペア:

[(1, 19729904), (2, 9864952), (4, 4932476), (8, 2466238), (16, 1233119), (19, 1038416), (38, 519208), (76, 259604), (152, 129802), (304, 64901)]