19911505

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{433}}^1\times {\mathrm{541}}^1$

素因数の和:996

約数の個数: 16

約数和(自身を含む): 25404624

約数和(自身を除く): 5493119

約数列:

[1, 5, 17, 85, 433, 541, 2165, 2705, 7361, 9197, 36805, 45985, 234253, 1171265, 3982301, 19911505]

約数ペア:

[(1, 19911505), (5, 3982301), (17, 1171265), (85, 234253), (433, 45985), (541, 36805), (2165, 9197), (2705, 7361)]