21340823

素因数分解:

$7^2\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{149}}^1$

素因数の和:279

約数の個数: 24

約数和(自身を含む): 25992000

約数和(自身を除く): 4651177

約数列:

[1, 7, 37, 49, 79, 149, 259, 553, 1043, 1813, 2923, 3871, 5513, 7301, 11771, 20461, 38591, 82397, 143227, 270137, 435527, 576779, 3048689, 21340823]

約数ペア:

[(1, 21340823), (7, 3048689), (37, 576779), (49, 435527), (79, 270137), (149, 143227), (259, 82397), (553, 38591), (1043, 20461), (1813, 11771), (2923, 7301), (3871, 5513)]