19902081

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{223}}^1\times {\mathrm{419}}^1$

素因数の和:716

約数の個数: 16

約数和(自身を含む): 27095040

約数和(自身を除く): 7192959

約数列:

[1, 3, 71, 213, 223, 419, 669, 1257, 15833, 29749, 47499, 89247, 93437, 280311, 6634027, 19902081]

約数ペア:

[(1, 19902081), (3, 6634027), (71, 280311), (213, 93437), (223, 89247), (419, 47499), (669, 29749), (1257, 15833)]