18892783

素因数分解:

$7^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{223}}^1$

素因数の和:276

約数の個数: 32

約数和(自身を含む): 25088000

約数和(自身を除く): 6195217

約数列:

[1, 7, 13, 19, 49, 91, 133, 223, 247, 343, 637, 931, 1561, 1729, 2899, 4237, 4459, 6517, 10927, 12103, 20293, 29659, 55081, 76489, 84721, 142051, 207613, 385567, 994357, 1453291, 2698969, 18892783]

約数ペア:

[(1, 18892783), (7, 2698969), (13, 1453291), (19, 994357), (49, 385567), (91, 207613), (133, 142051), (223, 84721), (247, 76489), (343, 55081), (637, 29659), (931, 20293), (1561, 12103), (1729, 10927), (2899, 6517), (4237, 4459)]