18989873

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{2011}}^1$

素因数の和:2108

約数の個数: 16

約数和(自身を含む): 23178240

約数和(自身を除く): 4188367

約数列:

[1, 7, 19, 71, 133, 497, 1349, 2011, 9443, 14077, 38209, 142781, 267463, 999467, 2712839, 18989873]

約数ペア:

[(1, 18989873), (7, 2712839), (19, 999467), (71, 267463), (133, 142781), (497, 38209), (1349, 14077), (2011, 9443)]