18711979

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1$

素因数の和:211

約数の個数: 32

約数和(自身を含む): 23708160

約数和(自身を除く): 4996181

約数列:

[1, 11, 13, 19, 71, 97, 143, 209, 247, 781, 923, 1067, 1261, 1349, 1843, 2717, 6887, 10153, 13871, 14839, 17537, 20273, 23959, 75757, 89531, 130853, 192907, 263549, 984841, 1439383, 1701089, 18711979]

約数ペア:

[(1, 18711979), (11, 1701089), (13, 1439383), (19, 984841), (71, 263549), (97, 192907), (143, 130853), (209, 89531), (247, 75757), (781, 23959), (923, 20273), (1067, 17537), (1261, 14839), (1349, 13871), (1843, 10153), (2717, 6887)]