21885017

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{2137}}^1$

素因数の和:2181

約数の個数: 24

約数和(自身を含む): 29247840

約数和(自身を除く): 7362823

約数列:

[1, 7, 11, 19, 49, 77, 133, 209, 539, 931, 1463, 2137, 10241, 14959, 23507, 40603, 104713, 164549, 284221, 446633, 1151843, 1989547, 3126431, 21885017]

約数ペア:

[(1, 21885017), (7, 3126431), (11, 1989547), (19, 1151843), (49, 446633), (77, 284221), (133, 164549), (209, 104713), (539, 40603), (931, 23507), (1463, 14959), (2137, 10241)]