19991554

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{39509}}^1$

素因数の和:39545

約数の個数: 16

約数和(自身を含む): 34136640

約数和(自身を除く): 14145086

約数列:

[1, 2, 11, 22, 23, 46, 253, 506, 39509, 79018, 434599, 869198, 908707, 1817414, 9995777, 19991554]

約数ペア:

[(1, 19991554), (2, 9995777), (11, 1817414), (22, 908707), (23, 869198), (46, 434599), (253, 79018), (506, 39509)]