18991179

素因数分解:

$3^6\times {\mathrm{109}}^1\times {\mathrm{239}}^1$

素因数の和:366

約数の個数: 28

約数和(自身を含む): 28855200

約数和(自身を除く): 9864021

約数列:

[1, 3, 9, 27, 81, 109, 239, 243, 327, 717, 729, 981, 2151, 2943, 6453, 8829, 19359, 26051, 26487, 58077, 78153, 79461, 174231, 234459, 703377, 2110131, 6330393, 18991179]

約数ペア:

[(1, 18991179), (3, 6330393), (9, 2110131), (27, 703377), (81, 234459), (109, 174231), (239, 79461), (243, 78153), (327, 58077), (717, 26487), (729, 26051), (981, 19359), (2151, 8829), (2943, 6453)]