18815923

素因数分解:

$7^1\times {\mathrm{17}}^2\times {\mathrm{71}}^1\times {\mathrm{131}}^1$

素因数の和:243

約数の個数: 24

約数和(自身を含む): 23341824

約数和(自身を除く): 4525901

約数列:

[1, 7, 17, 71, 119, 131, 289, 497, 917, 1207, 2023, 2227, 8449, 9301, 15589, 20519, 37859, 65107, 143633, 158117, 265013, 1106819, 2687989, 18815923]

約数ペア:

[(1, 18815923), (7, 2687989), (17, 1106819), (71, 265013), (119, 158117), (131, 143633), (289, 65107), (497, 37859), (917, 20519), (1207, 15589), (2023, 9301), (2227, 8449)]