19911305

素因数分解:

$5^1\times {\mathrm{53}}^1\times {\mathrm{227}}^1\times {\mathrm{331}}^1$

素因数の和:616

約数の個数: 16

約数和(自身を含む): 24525504

約数和(自身を除く): 4614199

約数列:

[1, 5, 53, 227, 265, 331, 1135, 1655, 12031, 17543, 60155, 75137, 87715, 375685, 3982261, 19911305]

約数ペア:

[(1, 19911305), (5, 3982261), (53, 375685), (227, 87715), (265, 75137), (331, 60155), (1135, 17543), (1655, 12031)]