19992255

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{78401}}^1$

素因数の和:78426

約数の個数: 16

約数和(自身を含む): 33869664

約数和(自身を除く): 13877409

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 78401, 235203, 392005, 1176015, 1332817, 3998451, 6664085, 19992255]

約数ペア:

[(1, 19992255), (3, 6664085), (5, 3998451), (15, 1332817), (17, 1176015), (51, 392005), (85, 235203), (255, 78401)]