19916912

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{28949}}^1$

素因数の和:29000

約数の個数: 20

約数和(自身を含む): 39487800

約数和(自身を除く): 19570888

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 28949, 57898, 115796, 231592, 463184, 1244807, 2489614, 4979228, 9958456, 19916912]

約数ペア:

[(1, 19916912), (2, 9958456), (4, 4979228), (8, 2489614), (16, 1244807), (43, 463184), (86, 231592), (172, 115796), (344, 57898), (688, 28949)]