19990012

素因数分解:

$2^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{16603}}^1$

素因数の和:16657

約数の個数: 24

約数和(自身を含む): 40912256

約数和(自身を除く): 20922244

約数列:

[1, 2, 4, 7, 14, 28, 43, 86, 172, 301, 602, 1204, 16603, 33206, 66412, 116221, 232442, 464884, 713929, 1427858, 2855716, 4997503, 9995006, 19990012]

約数ペア:

[(1, 19990012), (2, 9995006), (4, 4997503), (7, 2855716), (14, 1427858), (28, 713929), (43, 464884), (86, 232442), (172, 116221), (301, 66412), (602, 33206), (1204, 16603)]