19912569

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{163}}^1\times {\mathrm{947}}^1$

素因数の和:1156

約数の個数: 16

約数和(自身を含む): 27363072

約数和(自身を除く): 7450503

約数列:

[1, 3, 43, 129, 163, 489, 947, 2841, 7009, 21027, 40721, 122163, 154361, 463083, 6637523, 19912569]

約数ペア:

[(1, 19912569), (3, 6637523), (43, 463083), (129, 154361), (163, 122163), (489, 40721), (947, 21027), (2841, 7009)]