19858867

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{263}}^1$

素因数の和:367

約数の個数: 24

約数和(自身を含む): 24558336

約数和(自身を除く): 4699469

約数列:

[1, 7, 23, 49, 67, 161, 263, 469, 1127, 1541, 1841, 3283, 6049, 10787, 12887, 17621, 42343, 75509, 123347, 296401, 405283, 863429, 2836981, 19858867]

約数ペア:

[(1, 19858867), (7, 2836981), (23, 863429), (49, 405283), (67, 296401), (161, 123347), (263, 75509), (469, 42343), (1127, 17621), (1541, 12887), (1841, 10787), (3283, 6049)]