19905347

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{71}}^1\times {\mathrm{331}}^1$

素因数の和:431

約数の個数: 24

約数和(自身を含む): 25433856

約数和(自身を除く): 5528509

約数列:

[1, 7, 11, 71, 77, 121, 331, 497, 781, 847, 2317, 3641, 5467, 8591, 23501, 25487, 40051, 60137, 164507, 258511, 280357, 1809577, 2843621, 19905347]

約数ペア:

[(1, 19905347), (7, 2843621), (11, 1809577), (71, 280357), (77, 258511), (121, 164507), (331, 60137), (497, 40051), (781, 25487), (847, 23501), (2317, 8591), (3641, 5467)]