18809905

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^2\times {\mathrm{613}}^1$

素因数の和:673

約数の個数: 24

約数和(自身を含む): 25264872

約数和(自身を除く): 6454967

約数列:

[1, 5, 17, 19, 85, 95, 323, 361, 613, 1615, 1805, 3065, 6137, 10421, 11647, 30685, 52105, 58235, 197999, 221293, 989995, 1106465, 3761981, 18809905]

約数ペア:

[(1, 18809905), (5, 3761981), (17, 1106465), (19, 989995), (85, 221293), (95, 197999), (323, 58235), (361, 52105), (613, 30685), (1615, 11647), (1805, 10421), (3065, 6137)]